I've done that before... Then I send the owner an email to see if he would sell it.
I was excited shortly after to get an email from some guy offering me money for one of my domains. I replied and accepted the offer. I then sent the guy wire transfer instructions.
Oddly enough, I got an email shortly after from the seller of the domain, with wire transfer instructions. Apparently he had accepted my offer. I went to the bank and was setting up the wire when they told me I could not make a wire transfer to my own account.
I sat back and examined the situation.. now what exactly happened here...
JUST KIDDING.. lol, although I have checked domains that I THOUGHT I owned just to be sure, but never checked a domain having completely forgotten that I owned it only to find out I do.