I purchased $11.95 worth of goods from a (goyishe owned) grocery store with my credit card. The charge went through. A couple days later the charge only posted on my bill as $1.95 missing the other $10. And, at the end of the month, I paid my bill of only $1.95. Am I obligated to return the $10 to the store or is it the credit card company’s fault?
You are not obligated to do anything about it, and if they eventually charge you, obviously you should pay it.