diff -r a9a66e06731a web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js
--- a/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js	Thu May 09 13:00:33 2019 +0000
+++ b/web/org.openbravo.retail.posterminal/js/pointofsale/view/payment.js	Fri Jul 12 19:59:19 2019 -0300
@@ -744,6 +744,9 @@
         if (!OB.MobileApp.model.get('terminal').terminalType.calculateprepayments) {
           this.$.exactbutton.show();
         }
+      } else {
+        this.$.exactbutton.hide();
+        this.$.prepaymentsbuttons.hide();
       }
       this.updateLayawayAction();
     }