i searched all over the forum without finding something related.
I selling my digital products with links, which are created with the Specific Post/Page Link Generator ( for Customer Service ). The Specific Post/Page Link is valid for 2 month cause i produce the links on stock for a automatic selling list of my payment provider share-it.
And now the problem: One of the customers canceld his payment, but he has still the Specific Post/Page Link to go on my product site (grrrr

How can i prevent the use of Specific Post/Page Link for clients who stopped payment after i delivererd this link.
Is there the possibility of a "black list" where non paying links users get the message: access denied?
Kind greetings from Spain
Joe