Dear Creditnet: I recently began helping an elderly neighbor pay his bills. One credit card statement arrived today and indicated that his payment is due in just 18 days. They also request that it be mailed at least 7 to 10 days in advance to avoid a late payment fee, so that only gives him 11 days to cut a check and get it in the mail. This just doesn't sound right to me. Am I wrong? Answer: I wish my grandparents had a neighbor like you. Kudos for lending a helping hand. Your neighbor's credit issuer will need to receive payment by the due date or they will most likely charge a late fee and begin charging interest on the existing balance as well. That's why they're suggesting you send payment at least a week or so in advance. Unfortunately, the mail can be quite slow sometimes.