So your client gets mail addressed to:

Registrant Name: DNS Administrator
Registrant Organization: Hated
Registrant Street: 1567 Broadway
Registrant City: New York
Registrant State/Province: New York
Registrant Postal Code: 10036
Registrant Country: US
Registrant Phone: +1.5402277711

Quite interesting!  And the Hotel allows for another business to use their name on their address?  Even more interesting. 

I think the scam is up my friend.  I hope no one paid this guy by Bitcoins.  Kiss that money good bye.