Error: “Negative Bill Payment Is Not Allowed” on Bill Payment When Applying a Credit to a Bill With Smaller Amount

This is the expected behavior of NetSuite. Negative Bill Payments are not allowed. In order to save the Bill Payment, the user will need to edit the Vendor Credit Payment Amount to be lower or equal to the Vendor Bill Amount (maximum to zero out the Vendor Bill).

1. Click View Vendor Bill
2. Click Make Payment
3. Click Apply tab
4. Apply: Enter Checkmark by Bill and by Vendor Credit
   Note: Make sure to enter Payment Amount for Vendor Credit to be lower or equal as the Bill Amount.
5. Click Save