> I regularly travel for work and it's impossible for me to make any purchases on major sites like Walmart, Best Buy, Target, Costco, etc. They all will accept an order, charge my card, and then randomly cancel the order some hours to days later, and refund me.
These sites are not cancelling your orders. The card-issuing bank is.
Disagreed, the banks aren't cancelling it - they wouldn't authorize the transaction in the first place. Chances are, the banks are correctly returning an address verification mismatch if you didn't use your true billing address.
Most likely the stores are cancelling the orders because of billing/delivery address mismatch or (if you didn't set a different billing address) that it doesn't verify against your card.
Or, in the case of one particularly annoying site I tried to order from--a name mismatch.
The site was clear upfront that everything had to match EXACTLY or they would cancel the order. I logged in to my online banking and copy and pasted my debit card details to make sure there were no issues.
The one thing I didn't think to copy and paste was my own name because, I mean, I know my own name, right?
Apparently not as I'd entered "John Public" and to my surprise my debit card was issued to "John Q Public".
These sites are not cancelling your orders. The card-issuing bank is.
If you have persistent trouble, switch banks.