Pre-registering for WSOP

[Kips Bay Kid]

I filled out the online registration form and received my email.

Who do I make the cashier's check out to?

Email says to mail it to:
Rio Properties, Inc, dba, Rio All-Suite Hotel & Casino, World Series of Poker

Under wire transfer however it has:
BENEFICIARY: HARRAH’S LICENSE COMPANY, LLC

I called up the phone number and got an answering machine.

Anyone know?

Thanks.

[Kips Bay Kid]

I am assuming "World Series of Poker" would suffice, really wish someone would pickup the phone at the number they provide rather then just having an answering machine.