diff --git a/src/Koogle.Application/Services/ClubService.cs b/src/Koogle.Application/Services/ClubService.cs
index c38f8c2..20435be 100644
--- a/src/Koogle.Application/Services/ClubService.cs
+++ b/src/Koogle.Application/Services/ClubService.cs
@@ -3,6 +3,7 @@ using Koogle.Application.DTOs;
 using Koogle.Application.Interfaces;
 using Koogle.Domain.Entities;
 using Koogle.Domain.Interfaces;
+using Koogle.Infrastructure.Repositories;
 using KoogleApp.Data;
 using Microsoft.EntityFrameworkCore;
 using System.Security.Cryptography;
@@ -48,6 +49,12 @@ public class ClubService : IClubService
     /// <inheritdoc />
     public async Task<ClubDto> CreateAsync(CreateClubDto dto, CancellationToken ct = default)
     {
+        var existingClub = await _clubRepository.GetByNameAsync(dto.Name, null, ct);
+        if (existingClub != null)
+        {
+            throw new InvalidOperationException($"Club with name '{dto.Name}' already exists");
+        }
+
         var entity = new Club
         {
             Id = Guid.NewGuid(),
@@ -67,6 +74,12 @@ public class ClubService : IClubService
         var existing = await _clubRepository.GetByIdAsync(dto.Id, ct)
             ?? throw new InvalidOperationException($"Club with id {dto.Id} not found.");
 
+        var existingClub = await _clubRepository.GetByNameAsync(dto.Name, dto.Id, ct);
+        if (existingClub != null)
+        {
+            throw new InvalidOperationException($"Club with name '{dto.Name}' already exists");
+        }
+
         existing.Name = dto.Name;
         existing.ExpenseCalculation = dto.ExpenseCalculation;
         existing.ModifiedAt = DateTime.UtcNow;
diff --git a/src/Koogle.Application/Services/ExpenseService.cs b/src/Koogle.Application/Services/ExpenseService.cs
index d2bb12a..5aa3e74 100644
--- a/src/Koogle.Application/Services/ExpenseService.cs
+++ b/src/Koogle.Application/Services/ExpenseService.cs
@@ -3,6 +3,7 @@ using Koogle.Application.DTOs;
 using Koogle.Application.Interfaces;
 using Koogle.Domain.Entities;
 using Koogle.Domain.Interfaces;
+using Koogle.Infrastructure.Repositories;
 
 namespace Koogle.Application.Services;
 
@@ -51,6 +52,12 @@ public class ExpenseService : IExpenseService
     /// <inheritdoc />
     public async Task<ExpenseDto> CreateAsync(CreateExpenseDto dto, CancellationToken ct = default)
     {
+        var existingExpense = await _expenseRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, null, ct);
+        if (existingExpense != null)
+        {
+            throw new InvalidOperationException($"Expense with name '{dto.Name}' already exists");
+        }
+
         var entity = new Expense
         {
             Id = Guid.NewGuid(),
@@ -79,6 +86,12 @@ public class ExpenseService : IExpenseService
         if (existing.ClubId != _clubContext.ClubId)
             throw new InvalidOperationException("Expense does not belong to current club.");
 
+        var existingExpense = await _expenseRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, dto.Id, ct);
+        if (existingExpense != null)
+        {
+            throw new InvalidOperationException($"Expense with name '{dto.Name}' already exists");
+        }
+
         existing.Name = dto.Name;
         existing.Description = dto.Description;
         existing.Price = dto.Price;
diff --git a/src/Koogle.Application/Services/PersonService.cs b/src/Koogle.Application/Services/PersonService.cs
index 8040b0b..1e4d202 100644
--- a/src/Koogle.Application/Services/PersonService.cs
+++ b/src/Koogle.Application/Services/PersonService.cs
@@ -52,7 +52,7 @@ public class PersonService : IPersonService
     /// <inheritdoc />
     public async Task<PersonDto> CreateAsync(CreatePersonDto dto, CancellationToken ct = default)
     {
-        var existingPerson = await _personRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, ct);
+        var existingPerson = await _personRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, null, ct);
         if (existingPerson != null)
         {
             throw new InvalidOperationException($"Person with name '{dto.Name}' already exists");
@@ -81,7 +81,7 @@ public class PersonService : IPersonService
         if (existing.ClubId != _clubContext.ClubId)
             throw new InvalidOperationException("Person does not belong to current club.");
 
-        var existingPerson = await _personRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, ct);
+        var existingPerson = await _personRepository.GetByNameAsync(_clubContext.ClubId, dto.Name, dto.Id, ct);
         if (existingPerson != null)
         {
             throw new InvalidOperationException($"Person with name '{dto.Name}' already exists");
diff --git a/src/Koogle.Domain/Interfaces/IClubRepository.cs b/src/Koogle.Domain/Interfaces/IClubRepository.cs
index 6133f45..4b2a4f4 100644
--- a/src/Koogle.Domain/Interfaces/IClubRepository.cs
+++ b/src/Koogle.Domain/Interfaces/IClubRepository.cs
@@ -45,4 +45,13 @@ public interface IClubRepository
     /// <param name="ct">Cancellation token.</param>
     /// <returns>True if deleted successfully; otherwise, false.</returns>
     Task<bool> DeleteAsync(Guid id, CancellationToken ct = default);
+
+    /// <summary>
+    /// Get a club by its name within a specific context.
+    /// </summary>
+    /// <param name="clubName">Name to search for</param>
+    /// <param name="excludeGuid">A unique ID to exclude from search</param>
+    /// <param name="ct">Cancellation token.</param>
+    /// <returns></returns>
+    Task<Club?> GetByNameAsync(string clubName, Guid? excludeGuid, CancellationToken ct = default);
 }
diff --git a/src/Koogle.Domain/Interfaces/IExpenseRepository.cs b/src/Koogle.Domain/Interfaces/IExpenseRepository.cs
index 40a9d6a..c1b0c9b 100644
--- a/src/Koogle.Domain/Interfaces/IExpenseRepository.cs
+++ b/src/Koogle.Domain/Interfaces/IExpenseRepository.cs
@@ -46,4 +46,14 @@ public interface IExpenseRepository
     /// <param name="ct">Cancellation token.</param>
     /// <returns>True if deleted successfully; otherwise, false.</returns>
     Task<bool> DeleteAsync(Guid id, CancellationToken ct = default);
+
+    /// <summary>
+    /// Read an expense by its name within a specific club context.
+    /// </summary>
+    /// <param name="clubId"></param>
+    /// <param name="expenseName"></param>
+    /// <param name="excludeGuid">Guid of an expense, that should be excluded</param>
+    /// <param name="ct"></param>
+    /// <returns>The expense with the name or null</returns>
+    Task<Expense?> GetByNameAsync(Guid clubId, string expenseName, Guid? excludeGuid, CancellationToken ct = default);
 }
diff --git a/src/Koogle.Domain/Interfaces/IPersonRepository.cs b/src/Koogle.Domain/Interfaces/IPersonRepository.cs
index 957b466..11da9fe 100644
--- a/src/Koogle.Domain/Interfaces/IPersonRepository.cs
+++ b/src/Koogle.Domain/Interfaces/IPersonRepository.cs
@@ -50,9 +50,10 @@ public interface IPersonRepository
     /// <summary>
     /// Read a person by its name within a specific club context.
     /// </summary>
-    /// <param name="clubContextClubId"></param>
-    /// <param name="dtoName"></param>
+    /// <param name="clubId"></param>
+    /// <param name="personName"></param>
+    /// <param name="excludeGuid">Guid of a person, that should be excluded</param>
     /// <param name="ct"></param>
     /// <returns>The person with the name or null</returns>
-    Task<Person?> GetByNameAsync(Guid clubContextClubId, string dtoName, CancellationToken ct);
+    Task<Person?> GetByNameAsync(Guid clubId, string personName, Guid? excludeGuid, CancellationToken ct = default);
 }
diff --git a/src/Koogle.Infrastructure/Repositories/ClubRepository.cs b/src/Koogle.Infrastructure/Repositories/ClubRepository.cs
index 4c84e4c..b80d549 100644
--- a/src/Koogle.Infrastructure/Repositories/ClubRepository.cs
+++ b/src/Koogle.Infrastructure/Repositories/ClubRepository.cs
@@ -61,4 +61,18 @@ public class ClubRepository(IDbContextFactory<AppDbContext> contextFactory) : IC
         await context.SaveChangesAsync(ct);
         return true;
     }
+
+    /// <inheritdoc />
+    public async Task<Club?> GetByNameAsync(string clubName, Guid? excludeGuid, CancellationToken ct = default)
+    {
+        await using var context = await contextFactory.CreateDbContextAsync(ct);
+        var query = context.Clubs
+            .Where(c => c.Name.ToLower() == clubName.ToLower() && !c.IsDeleted);
+        if (excludeGuid.HasValue)
+        {
+            query = query.Where(c => c.Id != excludeGuid.Value);
+        }
+        var entity = await query.FirstOrDefaultAsync(ct);
+        return entity;
+    }
 }
diff --git a/src/Koogle.Infrastructure/Repositories/ExpenseRepository.cs b/src/Koogle.Infrastructure/Repositories/ExpenseRepository.cs
index 0d18ea7..fb6061b 100644
--- a/src/Koogle.Infrastructure/Repositories/ExpenseRepository.cs
+++ b/src/Koogle.Infrastructure/Repositories/ExpenseRepository.cs
@@ -63,4 +63,18 @@ public class ExpenseRepository(IDbContextFactory<AppDbContext> contextFactory) :
         await context.SaveChangesAsync(ct);
         return true;
     }
+
+    /// <inheritdoc />
+    public async Task<Expense?> GetByNameAsync(Guid clubId, string expenseName, Guid? excludeGuid, CancellationToken ct = default)
+    {
+        await using var context = await contextFactory.CreateDbContextAsync(ct);
+        var query = context.Expenses
+            .Where(e => e.ClubId == clubId && !e.IsDeleted && e.Name.ToLower() == expenseName.ToLower());
+        if (excludeGuid.HasValue)
+        {
+            query = query.Where(e => e.Id != excludeGuid.Value);
+        }
+        var entity = await query.FirstOrDefaultAsync(ct);
+        return entity;
+    }
 }
diff --git a/src/Koogle.Infrastructure/Repositories/PersonRepository.cs b/src/Koogle.Infrastructure/Repositories/PersonRepository.cs
index cfb60a0..b8e6eb9 100644
--- a/src/Koogle.Infrastructure/Repositories/PersonRepository.cs
+++ b/src/Koogle.Infrastructure/Repositories/PersonRepository.cs
@@ -65,11 +65,22 @@ public class PersonRepository(IDbContextFactory<AppDbContext> contextFactory) :
     }
 
     /// <inheritdoc />
-    public async Task<Person?> GetByNameAsync(Guid clubContextClubId, string dtoName, CancellationToken ct)
+    public async Task<Person?> GetByNameAsync(Guid clubId, string personName, Guid? excludeGuid, CancellationToken ct = default)
     {
         await using var context = await contextFactory.CreateDbContextAsync(ct);
-        var entity = await context.Persons
-            .FirstOrDefaultAsync(p => p.ClubId == clubContextClubId && p.Name == dtoName && !p.IsDeleted, ct);
+        Person? entity;
+        if (excludeGuid != null)
+        {
+            entity = await context.Persons
+                .FirstOrDefaultAsync(
+                    p => p.ClubId == clubId && p.Name.ToLower() == personName.ToLower() && !p.IsDeleted && p.Id != excludeGuid, ct);
+        } else
+        {
+            entity =  await context.Persons
+                .FirstOrDefaultAsync(
+                    p => p.ClubId == clubId && p.Name.ToLower() == personName.ToLower() && !p.IsDeleted, ct);
+        }
+
         return entity;
     }
 }