If presentations under this account http://www.authorstream.com/aSGuest53899/ belongs to you and you want us to remove it from authorSTREAM, please mark a mail to firstname.lastname@example.org with the following details:-
1. An electronic or physical signature of the person authorized to act on behalf of the owner
2. Your address, telephone number, and email address
3. A statement by you, made under penalty of perjury, that you are the copyright owner of the content used in presentation in question
Asking you to provide us with these details is a part of standard process to ensure that, you are the owner of these presentations.