Hi @HollyJ,

faced the same issue and finally found a solution. The key is to have the Difference field in CERO. The validation is on that field. I had an invoice for $400 with a payment of $300 and the were $100 of bank fees and commissions.

1- In the Match Transaction page I selected the invoice I wanted to match the payment to. The app completes the PAYMENT column with the payment, $300. Change it manually to $400, as you want to pay the full invoice.

2- Clicked on Resolve Difference, selected the Category as Bank Fees and complete the amount column to $ -100.

3- The app calculates the Difference as $0. If you press SAVE you are good to go.

What is confusing is that when you click the invoice, it autocompletes with the PAYED AMOUNT, so you can never get a difference of $0.

All the best,

Martin