Sent out a request with a 5x7 on 4/10 and received it back personalized on 4/19.
I used the address in the data base: 5842 W. Sunset Blvd, Los Angeles, CA 90028-6607

I sent an email to http://www.pennandteller.com/wordpress/contact/ on 4/11 asking for an autograph they sent an 8x10 on 4/16.
The address on the returned envelope was Steven Doctors, 3555 West Reno Ave, Suite L, Las Vegas, NV 89118.

I sent an email to Bill Gates. Got a photo back, but don’t think it’s genuine.

Email used- billg (@) microsoft.com
Address from letter- Microsoft Corporation, One Microsoft Way, Redmond, WA 98052

I sent an email autograph inquiry to https://www.wheeloffortune.com/contact on 4/8 and received it 4/13.

I sent an email to https://jontaffer.com/contact-taffer/ on 4/7/19 and received a signed 8x10 on 4/10/19.