How do I recognize free content?

Hello there, I got a question:

How do I know that free pics are uploaded by the site owner or permitted by him/her and/or the model(s)?

Is there a hint maybe like a direct link to their website or something?

I want to add an "Internet Model Forum" into my board but I am not sure what I can post and what not.

Thank you.

Umm what site do you want to post ?

not a specific site, only a preview site, e.g. a promo site for pretty virgins, angelfuns or kamilla18, trixieteen, nasty-angels, tsm or alyssa doll, katrina18, met-art or hegre, kristinafey, something like that... too much though but... u know

or maybe like collection links like tinyeve, heartbreakers, golden links or young lady bbs

I honestly think you should ask Teeno as I think - if not to busy he can best answer your questions .