That has happened to me. A couple times. They gave me a confirmation,though email, using the last 4 digits of a card I dont have. I thought perhaps it was an older card that might have still been saved but it was not. Weird. But it WAS, in the end, charged to the correct card. So i didn't worry about it.

If you use an online bill payment service with your bank, it is likely that their electronic payment method appears as a credit card on the recipient's site.

As nice as it sounds, there is no good Samaritan paying your bills. Just your bank sending your money somewhere you directed them. :-)

Is your account showing double payments, yours and the credit card payment? Do you have a credit balance on your account? Or is it showing you are just paid for the monthly payment?

I got a message my medical insurance payment did not got through on my credit card last month. I called, they showed the last 4 digits of the card. Not MY card or one I've ever had. They said there was NO way another persons credit card information could have appeared on my statement.....yet it did.....and it didn't go through.

Many years ago my dh had a separate checking account just for mad money. I happened to see a statement and it showed a phone bill being paid for. I knew that no bills were paid through that checking account. Sure enough we had paid someones phone bill for several months. We got all of our money back.

People do accidentally enter the wrong numbers since many account numbers are in sequence. No company will tell you where a payment is from because of the various privacy issues. Normally contacting the company and telling them that the payment is not yours should be enough. Some companies will not do anything until contacted by the person who made the payment. Continue making your regular payments and hopefully the extra payment will be reversed when the sender realizes their bill is not paid.

I have to confess when on line banking was new I fumble fingered a payment. It took about 6 months before the problem was corrected so be patient.

Payment errors and bank transaction errors are made daily and are corrected daily. Usually immediately.

I'm not sure why a customer would think it necessary to inquire about the nature or origin of a mistake whether in or against their favor. Report the mistake and expect a prompt correction. The how and why don't matter.

You would think though, that when making a payment online with a credit card, the security number would be completely different from yours, even if the other person CC# was a digit out from yours. So someone 'accidentally' paying your bill when they think they're paying their own isn't right. (I just paid for tickets to a movie and the security code on my new CC is different from my old CC: first time using new card today). And if the other person accidentally paid your account (who knows? It's possible), and their bill wasn't paid, they can have the payment reversed when they talk to their CC company to find out where that payment went.

That is interesting about the number from the bank possibly showing up as a credit card number. Did you check those last 4 digits against your account/routing number?