The default setting for payment tolerance is allowed. To disallow a certain customer or vendor payment tolerance you need to block tolerance on the respective customer or vendor card.
The following procedure is for blocking payment tolerance for a customer.
Open the Customer Card window.
Browse to the card on which you want to block tolerance.
On the Payments tab in the Block Payment Tolerance field, click to insert a check mark.
If you have customers with open entries, the program will ask if you want to remove payment tolerance from entries that are currently open.
Activating or Deactivating Payment Tolerance Warning
Payment Tolerance and Payment Discount Tolerance