Alyssa says:

I believe this coupon is only valid at Walmart, but I could be wrong. I had gotten this coupon a while ago and tried to use it and the cashier at Walmart said she it wouldn’t ring up, and if it doesn’t ring up, they can’t accept it. I had to end up going to customer service to get it resolved and I got it for free. What it turned out to be was when it was ringing up, it was prompting the cashier to make sure it was the right size and brand not saying it wasn’t accepted. Just a note in case you get the formula too.