diff --git a/plugins/interfaces.h b/plugins/interfaces.h
index fbda6e5..feae409 100755
--- a/plugins/interfaces.h
+++ b/plugins/interfaces.h
@@ -1559,6 +1559,7 @@ public:
 
     virtual void bna_setCurrentAcceptance(uint16_t notesToAccept) const =0;
         // can be used to block notes dynamically, example: from now only 5€ bills are allowed (if only 3€ are to be paid)
+        // only valid till next start-payment. Cannot add notes which are not activated in Json
 
     virtual void bna_requestParameters(void) const =0;
         // send command to DC in order to get static invariable device parameters like currency