generate a pdf after subscription

Hello,
For an association, I have to generate a pdf filled with CB ans Joomla user fields, so the user can download what should be name " member card" 
each year, it will change.
How can I manage that ? 
( I prefer not to use membership extensions because everything is already in CB and the owner won't learn something new)
Thanks for helping me.

We don't provide any PDF generating features. Typically you need a 3rd party library to accomplish that as PHP doesn't have PDF generation support out of the box either.

Something another user has done is use CB Content Bot to substitute the users data into a Joomla article. Then using @print CSS styles customized the print view of the article so it only showed the membership card. This then allows the user to print the card or use their browsers built in features to save it as a PDF. That's probably the easiest and cleanest solution.