Tom's Birthday

It was the birthday of an old basketball friend that I saw on facebook.  I was surprised when I got a message thanking me for the birthday wishes because I didn't take the time to wish him a happy birthday.  Then I looked at the link to his message and noticed that some other Ivan had wished him a happy birthday and when he went to thank him my name came up instead. I didn't want to reply and say he had the wrong Ivan because then I would have to admit that I didn't wish him a happy birthday myself.