diff --git a/src/Core/OrganizationFeatures/OrganizationCollections/CreateCollectionCommand.cs b/src/Core/OrganizationFeatures/OrganizationCollections/CreateCollectionCommand.cs
index 1cec2f5cc4..d83e30ad9c 100644
--- a/src/Core/OrganizationFeatures/OrganizationCollections/CreateCollectionCommand.cs
+++ b/src/Core/OrganizationFeatures/OrganizationCollections/CreateCollectionCommand.cs
@@ -1,4 +1,5 @@
 using Bit.Core.Entities;
+using Bit.Core.Enums;
 using Bit.Core.Exceptions;
 using Bit.Core.Models.Data;
 using Bit.Core.OrganizationFeatures.OrganizationCollections.Interfaces;
@@ -26,6 +27,11 @@ public class CreateCollectionCommand : ICreateCollectionCommand
     public async Task<Collection> CreateAsync(Collection collection, IEnumerable<CollectionAccessSelection> groups = null,
         IEnumerable<CollectionAccessSelection> users = null)
     {
+        if (collection.Type == CollectionType.DefaultUserCollection)
+        {
+            throw new BadRequestException("You cannot create a collection with the type as DefaultUserCollection.");
+        }
+
         var org = await _organizationRepository.GetByIdAsync(collection.OrganizationId);
         if (org == null)
         {
diff --git a/test/Core.Test/OrganizationFeatures/OrganizationCollections/CreateCollectionCommandTests.cs b/test/Core.Test/OrganizationFeatures/OrganizationCollections/CreateCollectionCommandTests.cs
index d180bad432..8937e8628d 100644
--- a/test/Core.Test/OrganizationFeatures/OrganizationCollections/CreateCollectionCommandTests.cs
+++ b/test/Core.Test/OrganizationFeatures/OrganizationCollections/CreateCollectionCommandTests.cs
@@ -199,4 +199,27 @@ public class CreateCollectionCommandTests
             .DidNotReceiveWithAnyArgs()
             .LogCollectionEventAsync(default, default);
     }
+
+    [Theory, BitAutoData]
+    public async Task CreateAsync_WithDefaultUserCollectionType_ThrowsBadRequest(
+        Organization organization, Collection collection, SutProvider<CreateCollectionCommand> sutProvider)
+    {
+        collection.Id = default;
+        collection.Type = CollectionType.DefaultUserCollection;
+        sutProvider.GetDependency<IOrganizationRepository>()
+            .GetByIdAsync(organization.Id)
+            .Returns(organization);
+
+        var ex = await Assert.ThrowsAsync<BadRequestException>(() => sutProvider.Sut.CreateAsync(collection));
+        Assert.Contains("You cannot create a collection with the type as DefaultUserCollection.", ex.Message);
+        await sutProvider.GetDependency<ICollectionRepository>()
+            .DidNotReceiveWithAnyArgs()
+            .CreateAsync(default);
+        await sutProvider.GetDependency<ICollectionRepository>()
+            .DidNotReceiveWithAnyArgs()
+            .CreateAsync(default, default, default);
+        await sutProvider.GetDependency<IEventService>()
+            .DidNotReceiveWithAnyArgs()
+            .LogCollectionEventAsync(default, default);
+    }
 }