Can a customer cancel a transaction

[GathsLandLLC]

I have a customer how works out of town and wants to give me the card info to manually enter in, I am a little hesitant because I don't know if the customer could cancel the transaction if not satisfied. Does anyone know if he could do that? The card will be American Express.

[VanKalkerFarms]

anyone that comes in with a card swiped or manually typed in or over the phone manually can file what is called a dispute with their credit card processor.

more about disputes.  https://squareup.com/help/us/en/article/3882-payment-disputes-walkthrough

https://squareup.com/help/us/en/article/6137-speeding-up-the-disputes-process