I want to warn you.
This user have positive "trust" opinions and +10, but something looks strange.
Check "trust" section:
https://bitcointalk.org/index.php?action=trust;u=408367This user's password was reset recently.
This user's email address was changed recently.
Everyone has the right to change the password and email address, but in situations like this will be better to ask about signed message from old address.
@OP can you sign message from one of these addresses:
1JLxk6GBM1GDB7L73roAPVuahiy3ehZCRR
1DJRLuia6ocS2JjnWvB3XJUnmLPrx41f8Z
Or at least from that one:1KUHu19upMoHRcj263eERgStAYhZ63zs7Q
?