diff --git a/SecuritySystem/SecuritySystemContracts/BusinessLogicsContracts/IClientLogic.cs b/SecuritySystem/SecuritySystemContracts/BusinessLogicsContracts/IClientLogic.cs
new file mode 100644
index 0000000..b590cf7
--- /dev/null
+++ b/SecuritySystem/SecuritySystemContracts/BusinessLogicsContracts/IClientLogic.cs
@@ -0,0 +1,15 @@
+using SecuritySystemContracts.BindingModels;
+using SecuritySystemContracts.SearchModels;
+using SecuritySystemContracts.ViewModels;
+
+namespace SecuritySystemContracts.BusinessLogicsContracts
+{
+    public interface IClientLogic
+    {
+        List<ClientViewModel>? ReadList(ClientSearchModel? model);
+        ClientViewModel? ReadElement(ClientSearchModel model);
+        bool Create(ClientBindingModel model);
+        bool Update(ClientBindingModel model);
+        bool Delete(ClientBindingModel model);
+    }
+}