There are times when customers will pay an amount higher than the invoice amount they owe the company.
You can still record the whole payment and apply it to a particular invoice.
The excess amount will become an advance payment from them that can still be applied to other succeeding transactions/invoices.
You can apply the over payments made on other invoices of your customers, to do this please follow those steps:
1. Navigate to the Customer record>Transactions>Open the invoice you need to pay
2. Click Accept Payment button
3. On the Apply tab>Invoices, the invoice is you need to pay is automatically checked
4. Go to the Credits tab, click the apply box next to the payment where you have an excess payment
5. Then click Save
The payment will then be applied to the invoice.
Note: The payment will continue to appear on the list under the Credits tab(#4) as long as there is still an unapply portion and this could still be applied to other invoices as payment.