So basically, there would be a link next to every attachment (or link) that a registerd user can click. It would bring them to a special page, where they could fill in reasons etc.

The system would notify the link owner that someone wants to see their attachments, and the link owner then goes to a special page, where they can decide whether to give access to the user or not.

Ivan
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Iyengar Yoga Resources / GT Plugins