diff --git a/src/main/java/net/kapcake/bankingservice/controllers/BankingServiceController.java b/src/main/java/net/kapcake/bankingservice/controllers/BankingServiceController.java
index fc5aa30..800baeb 100644
--- a/src/main/java/net/kapcake/bankingservice/controllers/BankingServiceController.java
+++ b/src/main/java/net/kapcake/bankingservice/controllers/BankingServiceController.java
@@ -2,8 +2,8 @@ package net.kapcake.bankingservice.controllers;
 
 import jakarta.validation.Valid;
 import net.kapcake.bankingservice.exceptions.ValidationException;
-import net.kapcake.bankingservice.model.dtos.PaymentDTO;
 import net.kapcake.bankingservice.model.dtos.BankAccountDTO;
+import net.kapcake.bankingservice.model.dtos.PaymentDTO;
 import net.kapcake.bankingservice.model.dtos.PaymentFilter;
 import net.kapcake.bankingservice.security.UserDetailsImpl;
 import net.kapcake.bankingservice.services.AccountService;
@@ -11,12 +11,12 @@ import net.kapcake.bankingservice.services.PaymentService;
 import org.springframework.http.HttpStatus;
 import org.springframework.security.core.annotation.AuthenticationPrincipal;
 import org.springframework.validation.BindingResult;
-import org.springframework.validation.FieldError;
-import org.springframework.validation.ObjectError;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.List;
 
+import static net.kapcake.bankingservice.controllers.ControllerUtils.getErrorString;
+
 @RestController
 public class BankingServiceController {
     private final AccountService accountService;
@@ -56,20 +56,5 @@ public class BankingServiceController {
         paymentService.deletePayment(authenticatedUser, id);
     }
 
-    private static String getErrorString(BindingResult bindingResult) {
-        StringBuilder builder = new StringBuilder("[");
-        List<ObjectError> allErrors = bindingResult.getAllErrors();
-        for (int i = 0; i < allErrors.size(); i++){
-            ObjectError error = allErrors.get(i);
-            if (i != 0) {
-                builder.append("\n");
-            }
-            if (error instanceof FieldError) {
-                builder.append(((FieldError) error).getField());
-            }
-            builder.append(": ").append(error.getDefaultMessage());
-        }
-        builder.append("]");
-        return builder.toString();
-    }
+
 }
diff --git a/src/main/java/net/kapcake/bankingservice/controllers/ControllerUtils.java b/src/main/java/net/kapcake/bankingservice/controllers/ControllerUtils.java
new file mode 100644
index 0000000..6232551
--- /dev/null
+++ b/src/main/java/net/kapcake/bankingservice/controllers/ControllerUtils.java
@@ -0,0 +1,27 @@
+package net.kapcake.bankingservice.controllers;
+
+import org.springframework.validation.BindingResult;
+import org.springframework.validation.FieldError;
+import org.springframework.validation.ObjectError;
+
+import java.util.List;
+
+public class ControllerUtils {
+    public static String getErrorString(BindingResult bindingResult) {
+        StringBuilder builder = new StringBuilder("[");
+        List<ObjectError> allErrors = bindingResult.getAllErrors();
+        for (int i = 0; i < allErrors.size(); i++) {
+            ObjectError error = allErrors.get(i);
+            if (i != 0) {
+                builder.append("\n");
+            }
+            if (error instanceof FieldError) {
+                builder.append(((FieldError) error).getField())
+                        .append(": ");
+            }
+            builder.append(error.getDefaultMessage());
+        }
+        builder.append("]");
+        return builder.toString();
+    }
+}