foreign tax certification

is there any way that they can deduce one's age from the information you give them on a foreign tax certificate? Also, out of the three certificates available for submission, which would i submit? I don't have any employees or the like but i do rent shared server space in the united states, does that count as involvement in the U.S.? These are the two options:

# Non-US persons

* Certification Of No United States Activities
* W-8BEN Certificate of Foreign Status of Beneficial Owner for United States Tax Withholding

I just submitted the first one listed was i right? I did that because it was like the one for Google Adsense where you are only obligated to submit your name acting as your signature.