diff --git a/src/FaultCodeExceptionFactory.php b/src/FaultCodeExceptionFactory.php
index 4750f53..4e42760 100644
--- a/src/FaultCodeExceptionFactory.php
+++ b/src/FaultCodeExceptionFactory.php
@@ -2,6 +2,7 @@
 
 namespace rocketfellows\ViesVatValidationInterface;
 
+use rocketfellows\ViesVatValidationInterface\exceptions\service\InvalidInputServiceException;
 use rocketfellows\ViesVatValidationInterface\exceptions\service\UnknownServiceErrorException;
 use rocketfellows\ViesVatValidationInterface\exceptions\VatNumberValidationException;
 
@@ -10,7 +11,11 @@ class FaultCodeExceptionFactory
     public function create(string $faultCode): VatNumberValidationException
     {
         // TODO: implement
-
-        return new UnknownServiceErrorException();
+        switch ($faultCode) {
+            case FaultCodes::INVALID_INPUT:
+                return new InvalidInputServiceException();
+            default:
+                return new UnknownServiceErrorException();
+        }
     }
 }