What is a mixed tender payment?
Mixed tender (or split tender) is paying for one sale with more than one payment method, such as part cash and part card.
A customer buys $85 of groceries, hands over a $50 bill and taps a card for the rest. That is a mixed tender sale: one sale, two payments. It also happens when a customer uses store credit or a voucher for part of a purchase, or when a card is declined for the full amount and the customer covers the balance another way.
The POS has to do three things. It must keep the sale open until the payments add up to the total, show the remaining balance after each tender, and record each payment against its own method. Change is only given on cash, and only when cash is the last tender or the total cash exceeds what is due.
Recording each tender separately is what keeps the close accurate. The cash line on the end-of-day report should include only the cash part, and the card line only the card part, so the drawer count and the card batch both reconcile. A POS that lumps mixed tender into one method will make one of them look wrong every night.
In SeroPOS, mixed tender runs through Split on the payment screen: create a Custom split, then pay each row with its own method (cash, debit, credit or a custom tender such as E-Transfer). In QSR Mode the inline split numpad shows Remaining, and each tender button records one leg. Each payment appears under its own method on the DSR.
A $132.40 sale is paid with $40.00 cash, a $60.00 debit tap and $32.40 on credit. The Z report adds $40.00 to cash, $60.00 to debit and $32.40 to credit. If the customer had handed over $50.00 cash for the first part, the POS would show $10.00 change on that leg only.