Unrelate a payment from an outgoing invoice Sometimes it is necessary to unrelate a payment from an outgoing invoice. To do this, the following steps are required: OZOLS > Payments > Documents > Outgoing invoices Mark the invoice for which payment should be unrelated Click Relate in the toolbar In the Billing - Sales documents window, select Unrelate Save changes. If the payment is unlinked with the intention of making corrections to the payment order, then the payment must be re-added to the invoice afterwards . You will find the instructions here