If an incorrect amount has been entered on a payment method in the POS, and that payment method does not allow negative postings (for example a gift voucher payment method), this can be corrected using the option “Mutate cash payment methods”.
This option can be found under:
Point of Sale → Mutate cash payment methods

After selecting the POS terminal and the receipt number, the payments used in the transaction will be shown.
For example, if an amount of €1,000 was entered on a gift voucher payment method instead of €100, the payment line of €1,000 will be selectable.
In the field for the amount to be moved, €900 can be entered in this example. This amount can then be moved to a cash payment method using the field “Move to new payment type”.
After performing this action, the €900 will be treated as a cash payment. This amount can then be refunded in the POS.
Note:
• The mutation cannot be performed retroactively.
• If the mutation is executed at a later moment, the correction applies to that period; the original transaction day remains unchanged.
• The receipt itself is not altered. When the receipt is opened in Backoffice, the payment methods will still appear as originally registered.