Your accounts are linked by account numbe/userid, etc; not by a particular credit card.
You can pay however you wish.
@Rickibotta Do you use Walmart pay? I was using PWI ("Giftcards") and even though it's only .05%, at least it counts as an Ibotta offer and I can do it at self checkout. My sister got Walmart GC rewards from various apps, and they don't always work at the self check register and she has to go to a different register, which is a P I T A. With that being said, I told her she can use Walmart pay and upload her GC's there and use them. However, it says ereceipts - can you use Walmart pay at a register and get a regular receipt?
Thank you for the suggestion to pay a penny. I am now getting a paper receipt when I remember to put a penny in the self-service machine before I use Walmart Pay. It saves me ink when I have to print out the receipt at home.
Now, if I can just remember to bring a penny to Walmart every time I go AND remember to put one in before I scan the QR code on the screen.