Can I change the payment method after a sale has been processed?

Retail & Point of Sale

Topic summary

Main issue: A Shopify POS sale with a split payment ($100 cash + $5 EFTPOS/debit) was mistakenly recorded as two EFTPOS payments, throwing off end-of-day analytics and register totals.

Context: The merchant manually processes debit and cash on an external terminal, then selects the payment type in POS afterward. This workflow led to misclassification of the cash portion as EFTPOS.

Key points raised:

  • One participant believes payment transactions on a processed order cannot be edited in Shopify POS.
  • Suggested workaround: refund the order and reprocess it with the correct split, especially if card payments are set up as a custom/manual method rather than processed through Shopify.
  • Trade-off: If the register was already closed, correcting by refund/re-ring will cause totals to be off across two days (but correct in aggregate).

Status: No definitive in-platform method to change payment type post-processing was confirmed. The practical option presented is refund and re-ring. Discussion remains open with no final resolution.

Summarized with AI on January 27. AI used: gpt-5.
1

Hi,

Today I made a sale with a customer instore via our Shopify POS.

The order # 12724.

They made a split payment of $100 cash and then $5 with an eftpos (debit) card.

If you go to that order you will see I accidentally processed it through the POS as two payments of Eftpos.

I did not know this until I was going to close the register at the end of the day and the analytics was all out.

I am wondering if I can make changes to the payment type once the sale/order has been processed?

I look forward to your reply,

Luella

2

The short answer, I think, is that you can’t change the transactions associated with an order once they are processed. However, I’m wondering how you managed to process a debit card payment through POS without actually taking money from the customer’s card? Do you have card payments set up as some kind of custom payment method which Shopify doesn’t process for you? If so, you could probably refund the order and ring it through again with the correct splits – but if you’ve already closed the register, your totals will be out on two days running (although correct when added together).

3

Hi Ruby,

We process our debit cards through manually and our cash payment types.

So then we just choose the payment type once the payment has been processed through the terminal.

That is how we managed to get the two payments and process them as different things.

Does this make sense?