diff --git a/src/BirthList.Web/Components/Account/Pages/Manage/Index.razor b/src/BirthList.Web/Components/Account/Pages/Manage/Index.razor
index 3fb6298..6ac6eb9 100644
--- a/src/BirthList.Web/Components/Account/Pages/Manage/Index.razor
+++ b/src/BirthList.Web/Components/Account/Pages/Manage/Index.razor
@@ -23,6 +23,21 @@
                 <input type="text" value="@username" class="form-control" placeholder="Please choose your username." disabled />
                 <label for="username" class="form-label">Username</label>
             </div>
+            <div class="form-floating mb-3">
+                <InputText @bind-Value="Input.FirstName" class="form-control" placeholder="Please enter your first name." />
+                <label class="form-label">First name</label>
+                <ValidationMessage For="() => Input.FirstName" class="text-danger" />
+            </div>
+            <div class="form-floating mb-3">
+                <InputText @bind-Value="Input.LastName" class="form-control" placeholder="Please enter your last name." />
+                <label class="form-label">Last name</label>
+                <ValidationMessage For="() => Input.LastName" class="text-danger" />
+            </div>
+            <div class="mb-3">
+                <label class="form-label">Address</label>
+                <InputTextArea @bind-Value="Input.Address" class="form-control" rows="3" placeholder="Please enter your address." />
+                <ValidationMessage For="() => Input.Address" class="text-danger" />
+            </div>
             <div class="form-floating mb-3">
                 <InputText @bind-Value="Input.PhoneNumber" class="form-control" placeholder="Please enter your phone number." />
                 <label for="phone-number" class="form-label">Phone number</label>
@@ -51,6 +66,9 @@
         phoneNumber = await UserManager.GetPhoneNumberAsync(user);
 
         Input.PhoneNumber ??= phoneNumber;
+        Input.FirstName ??= user.FirstName;
+        Input.LastName ??= user.LastName;
+        Input.Address ??= user.Address;
     }
 
     private async Task OnValidSubmitAsync()
@@ -64,12 +82,34 @@
             }
         }
 
+        user.FirstName = string.IsNullOrWhiteSpace(Input.FirstName) ? null : Input.FirstName.Trim();
+        user.LastName = string.IsNullOrWhiteSpace(Input.LastName) ? null : Input.LastName.Trim();
+        user.Address = string.IsNullOrWhiteSpace(Input.Address) ? null : Input.Address.Trim();
+
+        var updateResult = await UserManager.UpdateAsync(user);
+        if (!updateResult.Succeeded)
+        {
+            RedirectManager.RedirectToCurrentPageWithStatus("Error: Failed to update profile.", HttpContext);
+        }
+
         await SignInManager.RefreshSignInAsync(user);
         RedirectManager.RedirectToCurrentPageWithStatus("Your profile has been updated", HttpContext);
     }
 
     private sealed class InputModel
     {
+        [StringLength(100)]
+        [Display(Name = "First name")]
+        public string? FirstName { get; set; }
+
+        [StringLength(100)]
+        [Display(Name = "Last name")]
+        public string? LastName { get; set; }
+
+        [StringLength(500)]
+        [Display(Name = "Address")]
+        public string? Address { get; set; }
+
         [Phone]
         [Display(Name = "Phone number")]
         public string? PhoneNumber { get; set; }
diff --git a/src/BirthList.Web/Components/Layout/TopBar.razor b/src/BirthList.Web/Components/Layout/TopBar.razor
index 20a66d8..9e991b6 100644
--- a/src/BirthList.Web/Components/Layout/TopBar.razor
+++ b/src/BirthList.Web/Components/Layout/TopBar.razor
@@ -1,7 +1,19 @@
+@using BirthList.Web.Features.Registries
+@using BirthList.Web.Services
 @implements IDisposable
 
 @inject NavigationManager NavigationManager
 @inject AuthenticationStateProvider AuthenticationStateProvider
+@inject RegistryUserContext RegistryUserContext
+@inject ProfileCompletionService ProfileCompletionService
+
+@if (ShowProfileCompletionPrompt)
+{
+    <div class="profile-completion-banner">
+        <span>Please complete your profile (first name, last name, and address).</span>
+        <a href="/Account/Manage" class="profile-completion-link">Complete profile</a>
+    </div>
+}
 
 <nav class="top-bar">
     <div class="top-bar-left">
@@ -40,16 +52,34 @@
 
 @code {
     private string currentUrl = "";
+    private bool ShowProfileCompletionPrompt { get; set; }
 
-    protected override void OnInitialized()
+    protected override async Task OnInitializedAsync()
     {
         currentUrl = GetRelativePath(NavigationManager.Uri);
         NavigationManager.LocationChanged += OnLocationChanged;
+
+        await RefreshProfileCompletionPromptAsync().ConfigureAwait(false);
     }
 
-    private void OnLocationChanged(object? sender, LocationChangedEventArgs e)
+    private async void OnLocationChanged(object? sender, LocationChangedEventArgs e)
     {
         currentUrl = GetRelativePath(e.Location);
+        await RefreshProfileCompletionPromptAsync().ConfigureAwait(false);
+        await InvokeAsync(StateHasChanged).ConfigureAwait(false);
+    }
+
+    private async Task RefreshProfileCompletionPromptAsync()
+    {
+        var userId = await RegistryUserContext.GetUserIdAsync(CancellationToken.None).ConfigureAwait(false);
+        if (string.IsNullOrWhiteSpace(userId))
+        {
+            ShowProfileCompletionPrompt = false;
+            return;
+        }
+
+        var isComplete = await ProfileCompletionService.IsProfileCompleteAsync(userId).ConfigureAwait(false);
+        ShowProfileCompletionPrompt = !isComplete;
     }
 
     private string GetRelativePath(string absoluteUri)
diff --git a/src/BirthList.Web/Components/Layout/TopBar.razor.css b/src/BirthList.Web/Components/Layout/TopBar.razor.css
index aee2173..0ec69f6 100644
--- a/src/BirthList.Web/Components/Layout/TopBar.razor.css
+++ b/src/BirthList.Web/Components/Layout/TopBar.razor.css
@@ -1,3 +1,25 @@
+.profile-completion-banner {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    gap: 0.75rem;
+    background-color: #fff3cd;
+    color: #664d03;
+    border-bottom: 1px solid #ffecb5;
+    padding: 0.5rem 1rem;
+    font-size: 0.9rem;
+}
+
+.profile-completion-link {
+    color: #664d03;
+    font-weight: 600;
+    text-decoration: underline;
+}
+
+.profile-completion-link:hover {
+    color: #523d02;
+}
+
 .top-bar {
     display: flex;
     justify-content: space-between;
diff --git a/src/BirthList.Web/Data/ApplicationUser.cs b/src/BirthList.Web/Data/ApplicationUser.cs
index 85ed06a..f2d6af7 100644
--- a/src/BirthList.Web/Data/ApplicationUser.cs
+++ b/src/BirthList.Web/Data/ApplicationUser.cs
@@ -5,5 +5,8 @@ namespace BirthList.Web.Data;
 // Add profile data for application users by adding properties to the ApplicationUser class
 public class ApplicationUser : IdentityUser
 {
+    public string? FirstName { get; set; }
+    public string? LastName { get; set; }
+    public string? Address { get; set; }
 }
 
diff --git a/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.Designer.cs b/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.Designer.cs
new file mode 100644
index 0000000..24f7866
--- /dev/null
+++ b/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.Designer.cs
@@ -0,0 +1,288 @@
+// <auto-generated />
+using System;
+using BirthList.Web.Data;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace BirthList.Web.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20260518213355_AddUserProfileFields")]
+    partial class AddUserProfileFields
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.26")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
+
+            modelBuilder.Entity("BirthList.Web.Data.ApplicationUser", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<int>("AccessFailedCount")
+                        .HasColumnType("int");
+
+                    b.Property<string>("Address")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Email")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<bool>("EmailConfirmed")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("FirstName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("LastName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<bool>("LockoutEnabled")
+                        .HasColumnType("bit");
+
+                    b.Property<DateTimeOffset?>("LockoutEnd")
+                        .HasColumnType("datetimeoffset");
+
+                    b.Property<string>("NormalizedEmail")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<string>("NormalizedUserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<string>("PasswordHash")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("PhoneNumber")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<bool>("PhoneNumberConfirmed")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("SecurityStamp")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<bool>("TwoFactorEnabled")
+                        .HasColumnType("bit");
+
+                    b.Property<string>("UserName")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedEmail")
+                        .HasDatabaseName("EmailIndex");
+
+                    b.HasIndex("NormalizedUserName")
+                        .IsUnique()
+                        .HasDatabaseName("UserNameIndex")
+                        .HasFilter("[NormalizedUserName] IS NOT NULL");
+
+                    b.ToTable("AspNetUsers", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRole", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("ConcurrencyStamp")
+                        .IsConcurrencyToken()
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("Name")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.Property<string>("NormalizedName")
+                        .HasMaxLength(256)
+                        .HasColumnType("nvarchar(256)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("NormalizedName")
+                        .IsUnique()
+                        .HasDatabaseName("RoleNameIndex")
+                        .HasFilter("[NormalizedName] IS NOT NULL");
+
+                    b.ToTable("AspNetRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("RoleId")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(450)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetRoleClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.Property<int>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("int");
+
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
+                    b.Property<string>("ClaimType")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("ClaimValue")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(450)");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserClaims", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("ProviderKey")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("ProviderDisplayName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("UserId")
+                        .IsRequired()
+                        .HasColumnType("nvarchar(450)");
+
+                    b.HasKey("LoginProvider", "ProviderKey");
+
+                    b.HasIndex("UserId");
+
+                    b.ToTable("AspNetUserLogins", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("RoleId")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.HasKey("UserId", "RoleId");
+
+                    b.HasIndex("RoleId");
+
+                    b.ToTable("AspNetUserRoles", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.Property<string>("UserId")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("LoginProvider")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("nvarchar(450)");
+
+                    b.Property<string>("Value")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.HasKey("UserId", "LoginProvider", "Name");
+
+                    b.ToTable("AspNetUserTokens", (string)null);
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityRoleClaim<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserClaim<string>", b =>
+                {
+                    b.HasOne("BirthList.Web.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserLogin<string>", b =>
+                {
+                    b.HasOne("BirthList.Web.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserRole<string>", b =>
+                {
+                    b.HasOne("Microsoft.AspNetCore.Identity.IdentityRole", null)
+                        .WithMany()
+                        .HasForeignKey("RoleId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("BirthList.Web.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("Microsoft.AspNetCore.Identity.IdentityUserToken<string>", b =>
+                {
+                    b.HasOne("BirthList.Web.Data.ApplicationUser", null)
+                        .WithMany()
+                        .HasForeignKey("UserId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}
diff --git a/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.cs b/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.cs
new file mode 100644
index 0000000..894c565
--- /dev/null
+++ b/src/BirthList.Web/Data/Migrations/20260518213355_AddUserProfileFields.cs
@@ -0,0 +1,48 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace BirthList.Web.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddUserProfileFields : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Address",
+                table: "AspNetUsers",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "FirstName",
+                table: "AspNetUsers",
+                type: "nvarchar(max)",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "LastName",
+                table: "AspNetUsers",
+                type: "nvarchar(max)",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Address",
+                table: "AspNetUsers");
+
+            migrationBuilder.DropColumn(
+                name: "FirstName",
+                table: "AspNetUsers");
+
+            migrationBuilder.DropColumn(
+                name: "LastName",
+                table: "AspNetUsers");
+        }
+    }
+}
diff --git a/src/BirthList.Web/Data/Migrations/ApplicationDbContextModelSnapshot.cs b/src/BirthList.Web/Data/Migrations/ApplicationDbContextModelSnapshot.cs
index 3d28c2e..9e5de3d 100644
--- a/src/BirthList.Web/Data/Migrations/ApplicationDbContextModelSnapshot.cs
+++ b/src/BirthList.Web/Data/Migrations/ApplicationDbContextModelSnapshot.cs
@@ -1,8 +1,9 @@
-// <auto-generated />
+// <auto-generated />
 using System;
 using BirthList.Web.Data;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Metadata;
 using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 
 #nullable disable
@@ -15,7 +16,11 @@ namespace BirthList.Web.Migrations
         protected override void BuildModel(ModelBuilder modelBuilder)
         {
 #pragma warning disable 612, 618
-            modelBuilder.HasAnnotation("ProductVersion", "8.0.0");
+            modelBuilder
+                .HasAnnotation("ProductVersion", "8.0.26")
+                .HasAnnotation("Relational:MaxIdentifierLength", 128);
+
+            SqlServerModelBuilderExtensions.UseIdentityColumns(modelBuilder);
 
             modelBuilder.Entity("BirthList.Web.Data.ApplicationUser", b =>
                 {
@@ -25,6 +30,9 @@ namespace BirthList.Web.Migrations
                     b.Property<int>("AccessFailedCount")
                         .HasColumnType("int");
 
+                    b.Property<string>("Address")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<string>("ConcurrencyStamp")
                         .IsConcurrencyToken()
                         .HasColumnType("nvarchar(max)");
@@ -36,6 +44,12 @@ namespace BirthList.Web.Migrations
                     b.Property<bool>("EmailConfirmed")
                         .HasColumnType("bit");
 
+                    b.Property<string>("FirstName")
+                        .HasColumnType("nvarchar(max)");
+
+                    b.Property<string>("LastName")
+                        .HasColumnType("nvarchar(max)");
+
                     b.Property<bool>("LockoutEnabled")
                         .HasColumnType("bit");
 
@@ -115,6 +129,8 @@ namespace BirthList.Web.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("int");
 
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
                     b.Property<string>("ClaimType")
                         .HasColumnType("nvarchar(max)");
 
@@ -138,6 +154,8 @@ namespace BirthList.Web.Migrations
                         .ValueGeneratedOnAdd()
                         .HasColumnType("int");
 
+                    SqlServerPropertyBuilderExtensions.UseIdentityColumn(b.Property<int>("Id"));
+
                     b.Property<string>("ClaimType")
                         .HasColumnType("nvarchar(max)");
 
diff --git a/src/BirthList.Web/Features/Registries/RegistryService.cs b/src/BirthList.Web/Features/Registries/RegistryService.cs
index 9ab78e3..84fa852 100644
--- a/src/BirthList.Web/Features/Registries/RegistryService.cs
+++ b/src/BirthList.Web/Features/Registries/RegistryService.cs
@@ -95,18 +95,22 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => admins.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         return admins
             .Select(userId => new RegistryAdminDisplayModel
             {
                 UserId = userId,
-                DisplayName = usersById.TryGetValue(userId, out var email) && !string.IsNullOrWhiteSpace(email)
-                    ? email
+                DisplayName = usersById.TryGetValue(userId, out var displayName)
+                    ? displayName
                     : userId
             })
             .ToList();
@@ -180,12 +184,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         var purchasesByItemId = purchases
             .GroupBy(x => x.RegistryItemId)
             .ToDictionary(g => g.Key, g => g.ToList());
@@ -422,12 +430,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         var purchasesByItemId = purchases
             .GroupBy(x => x.RegistryItemId)
             .ToDictionary(g => g.Key, g => g.ToList());
@@ -508,12 +520,16 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
             userIds.Add(contribution.UserId);
         }
 
-        var usersById = await applicationDbContext.Users
+        var users = await applicationDbContext.Users
             .Where(x => userIds.Contains(x.Id))
-            .Select(x => new { x.Id, x.Email })
-            .ToDictionaryAsync(x => x.Id, x => x.Email ?? x.Id, cancellationToken)
+            .Select(x => new { x.Id, x.Email, x.FirstName, x.LastName })
+            .ToListAsync(cancellationToken)
             .ConfigureAwait(false);
 
+        var usersById = users.ToDictionary(
+            x => x.Id,
+            x => BuildUserDisplayName(x.FirstName, x.LastName, x.Email, x.Id));
+
         return new RegistryItemEditModel
         {
             Id = item.Id,
@@ -907,4 +923,20 @@ internal sealed class RegistryService(RegistryDbContext registryDbContext, Appli
         var fallback = Convert.ToHexString(SHA256.HashData(Encoding.UTF8.GetBytes(Guid.NewGuid().ToString("N")))).Substring(0, 16).ToLowerInvariant();
         return fallback;
     }
+
+    private static string BuildUserDisplayName(string? firstName, string? lastName, string? email, string userId)
+    {
+        var fullName = $"{firstName} {lastName}".Trim();
+        if (!string.IsNullOrWhiteSpace(fullName))
+        {
+            return fullName;
+        }
+
+        if (!string.IsNullOrWhiteSpace(email))
+        {
+            return email;
+        }
+
+        return userId;
+    }
 }
diff --git a/src/BirthList.Web/Program.cs b/src/BirthList.Web/Program.cs
index 9c88ce1..8c39d69 100644
--- a/src/BirthList.Web/Program.cs
+++ b/src/BirthList.Web/Program.cs
@@ -90,6 +90,17 @@ builder.Services.AddDbContext<ApplicationDbContext>(options =>
     options.UseSqlite(connectionString);
 });
 
+builder.Services.AddDbContextFactory<ApplicationDbContext>(options =>
+{
+    if (string.Equals(dataProvider, "SqlServer", StringComparison.OrdinalIgnoreCase))
+    {
+        options.UseSqlServer(connectionString);
+        return;
+    }
+
+    options.UseSqlite(connectionString);
+}, ServiceLifetime.Scoped);
+
 builder.Services.AddDbContext<RegistryDbContext>(options =>
 {
     if (string.Equals(dataProvider, "SqlServer", StringComparison.OrdinalIgnoreCase))
@@ -113,6 +124,7 @@ builder.Services.AddIdentityCore<ApplicationUser>(options =>
 
 builder.Services.AddScoped<SmtpEmailSender>();
 builder.Services.AddScoped<IEmailSender<ApplicationUser>>(serviceProvider => serviceProvider.GetRequiredService<SmtpEmailSender>());
+builder.Services.AddScoped<ProfileCompletionService>();
 
 var app = builder.Build();
 
diff --git a/src/BirthList.Web/Services/ProfileCompletionService.cs b/src/BirthList.Web/Services/ProfileCompletionService.cs
new file mode 100644
index 0000000..50aceb1
--- /dev/null
+++ b/src/BirthList.Web/Services/ProfileCompletionService.cs
@@ -0,0 +1,30 @@
+using BirthList.Web.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace BirthList.Web.Services;
+
+internal sealed class ProfileCompletionService(IDbContextFactory<ApplicationDbContext> dbContextFactory)
+{
+    public async Task<bool> IsProfileCompleteAsync(string userId)
+    {
+        ArgumentException.ThrowIfNullOrWhiteSpace(userId);
+
+        await using var dbContext = await dbContextFactory.CreateDbContextAsync().ConfigureAwait(false);
+
+        var user = await dbContext.Users
+            .AsNoTracking()
+            .Where(x => x.Id == userId)
+            .Select(x => new { x.FirstName, x.LastName, x.Address })
+            .FirstOrDefaultAsync()
+            .ConfigureAwait(false);
+
+        if (user is null)
+        {
+            return true;
+        }
+
+        return !string.IsNullOrWhiteSpace(user.FirstName)
+            && !string.IsNullOrWhiteSpace(user.LastName)
+            && !string.IsNullOrWhiteSpace(user.Address);
+    }
+}