Any help to a couple of issues in R 1

[fsalinas]

Any help to a couple of issues in RES 3700 please?

1) A way to VOID a payment using transaction services or whatever.
2) A way to post a TIP to a Credit Card payment already done. I had trying "addToExistingTransaction" but unsuccessfully.

 

[POSKitchen]

1. you need to send a new check as a minus posting with the transaction api you can not change a booked check. (In many European countries a change to a existing check is not allowed by law)
2. No, it is not possible to modify an existing closed invoice via the API. You need to send the full invoice again in minus and plus.

With Simphony Cloud and the new REST API this is possible.