diff --git a/test/Core.Test/AdminConsole/OrganizationFeatures/OrganizationUsers/DeleteClaimedOrganizationUserAccountValidatorTests.cs b/test/Core.Test/AdminConsole/OrganizationFeatures/OrganizationUsers/DeleteClaimedOrganizationUserAccountValidatorTests.cs
new file mode 100644
index 0000000000..dfb0cf9abd
--- /dev/null
+++ b/test/Core.Test/AdminConsole/OrganizationFeatures/OrganizationUsers/DeleteClaimedOrganizationUserAccountValidatorTests.cs
@@ -0,0 +1,386 @@
+using Bit.Core.AdminConsole.Errors;
+using Bit.Core.AdminConsole.OrganizationFeatures.OrganizationUsers;
+using Bit.Core.AdminConsole.Repositories;
+using Bit.Core.AdminConsole.Shared.Validation;
+using Bit.Core.Context;
+using Bit.Core.Entities;
+using Bit.Core.Enums;
+using Bit.Core.Repositories;
+using Bit.Test.Common.AutoFixture;
+using Bit.Test.Common.AutoFixture.Attributes;
+using NSubstitute;
+using Xunit;
+
+namespace Bit.Api.Test.AdminConsole.Validators;
+
+[SutProviderCustomize]
+public class DeleteClaimedOrganizationUserAccountValidatorTests
+{
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_ShouldExecuteSyncValidatorsFirst(
+        Guid organizationId,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        // Arrange
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = organizationId,
+            OrganizationUser = null,
+            User = null,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        // Act
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        // Assert
+        Assert.Single(result.InvalidResults);
+
+        var invalidResult = result.InvalidResults.First();
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.Equal("Member not found.", invalidResult.ErrorMessageString);
+
+        await sutProvider.GetDependency<ICurrentContext>()
+            .DidNotReceive()
+            .OrganizationOwner(Arg.Any<Guid>()); ;
+
+
+        await sutProvider.GetDependency<IOrganizationUserRepository>()
+            .DidNotReceive()
+            .GetCountByOnlyOwnerAsync(Arg.Any<Guid>()); ;
+
+        await sutProvider.GetDependency<IProviderUserRepository>()
+            .DidNotReceive()
+            .GetCountByOnlyOwnerAsync(Arg.Any<Guid>()); ;
+    }
+
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_ShouldEnsureUserBelongsToOrganization(
+        Guid organizationId,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        // Arrange
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = organizationId,
+            OrganizationUser = null,
+            User = null,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        // Act
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        // Assert
+        Assert.Single(result.InvalidResults);
+
+        var invalidResult = result.InvalidResults.First();
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<RecordNotFoundError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("Member not found.", invalidResult.ErrorMessageString);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_ShouldEnsureUserStatusIsNotInvited(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Invited;
+        orgUser.UserId = user.Id;
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("You cannot delete a member with Invited status.", invalidResult.ErrorMessageString);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_ShouldPreventSelfDeletion(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.UserId = user.Id;
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = user.Id
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("You cannot delete yourself.", invalidResult.ErrorMessageString);
+    }
+
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_ShouldEnsureUserIsClaimedByOrganization(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.UserId = user.Id;
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = false,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("Member is not managed by the organization.", invalidResult.ErrorMessageString);
+    }
+
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_EnsureOnlyOwnersCanDeleteOwnersAsync(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.Type = OrganizationUserType.Owner;
+        orgUser.UserId = user.Id;
+
+        var context = sutProvider.GetDependency<ICurrentContext>();
+        context.OrganizationOwner(orgUser.OrganizationId).Returns(false);
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("Only owners can delete other owners.", invalidResult.ErrorMessageString);
+
+        await sutProvider.GetDependency<ICurrentContext>()
+            .Received(1)
+            .OrganizationOwner(orgUser.OrganizationId);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_EnsureUserIsNotSoleOrganizationOwnerAsync(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.Type = OrganizationUserType.Owner;
+        orgUser.UserId = user.Id;
+
+        var context = sutProvider.GetDependency<ICurrentContext>();
+        context.OrganizationOwner(orgUser.OrganizationId).Returns(true);
+
+        var orgRepo = sutProvider.GetDependency<IOrganizationUserRepository>();
+        orgRepo.GetCountByOnlyOwnerAsync(user.Id).Returns(1);
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.StartsWith("Cannot delete this user because it is the sole owner", invalidResult.ErrorMessageString);
+
+        await sutProvider.GetDependency<IOrganizationUserRepository>()
+            .Received(1)
+            .GetCountByOnlyOwnerAsync(user.Id);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_EnsureUserIsNotSoleProviderOwnerAsync(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.Type = OrganizationUserType.Owner;
+        orgUser.UserId = user.Id;
+
+        var context = sutProvider.GetDependency<ICurrentContext>();
+        context.OrganizationOwner(orgUser.OrganizationId).Returns(true);
+
+        var orgRepo = sutProvider.GetDependency<IOrganizationUserRepository>();
+        orgRepo.GetCountByOnlyOwnerAsync(user.Id).Returns(0);
+
+        var providerRepo = sutProvider.GetDependency<IProviderUserRepository>();
+        providerRepo.GetCountByOnlyOwnerAsync(user.Id).Returns(1);
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.StartsWith("Cannot delete this user because it is the sole owner", invalidResult.ErrorMessageString);
+
+        await sutProvider.GetDependency<IProviderUserRepository>()
+            .Received(1)
+            .GetCountByOnlyOwnerAsync(user.Id);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_EnsureCustomUsersCannotDeleteAdminsAsync(
+        OrganizationUser orgUser,
+        User user,
+        SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        orgUser.Status = OrganizationUserStatusType.Confirmed;
+        orgUser.Type = OrganizationUserType.Admin;
+        orgUser.UserId = user.Id;
+
+        var context = sutProvider.GetDependency<ICurrentContext>();
+        context.OrganizationCustom(orgUser.OrganizationId).Returns(true);
+
+        var orgRepo = sutProvider.GetDependency<IOrganizationUserRepository>();
+        orgRepo.GetCountByOnlyOwnerAsync(user.Id).Returns(0);
+
+        var providerRepo = sutProvider.GetDependency<IProviderUserRepository>();
+        providerRepo.GetCountByOnlyOwnerAsync(user.Id).Returns(0);
+
+        var request = new DeleteUserValidationRequest
+        {
+            OrganizationId = orgUser.OrganizationId,
+            OrganizationUser = orgUser,
+            User = user,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        var result = await sutProvider.Sut.ValidateAsync([request]);
+
+        var invalidResult = Assert.Single(result.InvalidResults);
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalidResult);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalidResult.Errors.First());
+        Assert.Equal("Custom users can not delete admins.", invalidResult.ErrorMessageString);
+
+        await sutProvider.GetDependency<ICurrentContext>()
+            .Received(1)
+            .OrganizationCustom(orgUser.OrganizationId);
+    }
+
+    [Theory]
+    [BitAutoData]
+    public async Task ValidateAsync_WithMixedOfSuccessesAndFailures(
+     OrganizationUser validOrgUser,
+     User validUser,
+     OrganizationUser invalidOrgUser,
+     User invalidUser,
+     SutProvider<DeleteClaimedOrganizationUserAccountValidator> sutProvider)
+    {
+        // Arrange - valid user
+        validOrgUser.Status = OrganizationUserStatusType.Confirmed;
+        validOrgUser.Type = OrganizationUserType.Admin;
+        validOrgUser.UserId = validUser.Id;
+
+        var context = sutProvider.GetDependency<ICurrentContext>();
+        context.OrganizationOwner(validOrgUser.OrganizationId).Returns(true);
+        context.OrganizationCustom(validOrgUser.OrganizationId).Returns(false);
+
+        var orgRepo = sutProvider.GetDependency<IOrganizationUserRepository>();
+        orgRepo.GetCountByOnlyOwnerAsync(validUser.Id).Returns(0);
+
+        var providerRepo = sutProvider.GetDependency<IProviderUserRepository>();
+        providerRepo.GetCountByOnlyOwnerAsync(validUser.Id).Returns(0);
+
+        var validRequest = new DeleteUserValidationRequest
+        {
+            OrganizationId = validOrgUser.OrganizationId,
+            OrganizationUser = validOrgUser,
+            User = validUser,
+            IsClaimed = true,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        // Arrange - invalid user (unclaimed account)
+        invalidOrgUser.Status = OrganizationUserStatusType.Confirmed;
+        invalidOrgUser.Type = OrganizationUserType.Admin;
+        invalidOrgUser.UserId = invalidUser.Id;
+
+        var invalidRequest = new DeleteUserValidationRequest
+        {
+            OrganizationId = invalidOrgUser.OrganizationId,
+            OrganizationUser = invalidOrgUser,
+            User = invalidUser,
+            IsClaimed = false,
+            DeletingUserId = Guid.NewGuid()
+        };
+
+        // Act
+        var result = await sutProvider.Sut.ValidateAsync([validRequest, invalidRequest]);
+
+        // Assert
+        Assert.Single(result.ValidResults);
+        Assert.Single(result.InvalidResults);
+
+        var invalid = result.InvalidResults.First();
+        Assert.IsType<Invalid<DeleteUserValidationRequest>>(invalid);
+        Assert.IsType<BadRequestError<DeleteUserValidationRequest>>(invalid.Errors.First());
+        Assert.Equal("Member is not managed by the organization.", invalid.ErrorMessageString);
+    }
+
+}