LifeinAsia - 9:42 pm on May 11, 2009 (gmt 0)
The statute of limitations for disputing credit card charges is usually 3 months from the statement date. My understanding (although IANAL) is that after that point, the customer has no recourse as he has by default accepted the charge without dispute.
you must have forged the signature
If he's going to claim that, then keeping the receipt isn't going to help any.