First off, this requires you to have access to the e-mail address on the account.
A while ago, my account was scammed from me, by letting a guy login and see if there my characters actually existed, the only thing was i thought i knew the SQ&A, but nfortunately i didnt. But w/e...
A few weeks ago, since the account is still attached to my E-MAil, the guy had **tried**to put a payment on the account, but for some reason it had failed, and it had another email after that saying that it had worked...I looked at the one that failed, and saw that it read ....(Dear: Blah Blah)..I was shocked to see that it said the full name on the email, i had already knew the last name on the account and it was correct....
Hope this helps everyone that was given a wrong last name through trade or anything else.!!!!!!