You could probably use a Joomla article since it has a built in print feature. You can use CB Content Bot to substitute the users information in. You'd then just customize it using CSS and HTML for them to print and cut out. If you want to generate an actual image file probably only way to do that is using a Code action and PHP image functions in CB Auto Actions to generate an image.

These are two great ideas. If I'm not mistaken, I can create a tab in the users profile to embed the article or image.

Ideally your image would just make the appropriate PHP calls and then the auto action url would just be the src for the image tag. As for article I suppose if you used a Joomla article module then output the module in a Custom HTML field that'd work.

The first one seems straight forward. The second one might be more like what I'd want (an image file). Can you point me towards more info on how to do that? I'm not entirely familiar with the process.

It's not an easy implementation so I do not recommend it unless you're experienced with PHP. See the below PHP documentation for GD reference guide on how to generate an image. You can use this in a Code action with Method set to PHP.

www.php.net/manual/en/ref.image.php

A Joomla article with substitutions and simply using the articles built in print feature would be the easiest approach otherwise you may want to check if there's a Joomla extension for generating membership cards or consider hiring a developer experienced enough to write the PHP for you if you don't have enough experience yourself.

There are likely several examples on stackoverflow as well.

2. membership plan name [?]

Check the description of the "cbpaidsubsbot" plugin in Extensions > Plugins for available CBSubs substitutions. For plan name you'd use the below for example.

[cbsubs:plans plan="PLAN_ID_HERE" output="name" /]

3. membership expiry date [?]

Same as #2 and is done as follows for example.

[cbsubs:subscriptions plan="PLAN_ID_HERE" output="expiry_date" /]

4. plan image [cb_planimage] only displays the url to the image

Please read the substitution tutorial below carefully.

www.joomlapolis.com/documentation/279-community-builder/tutorials/18353-using-substitutions-throughout-cb

You're using a raw substitution so it's only going to display URL. Use the below for HTML output.

[cb:userfield field="FIELD_NAME" /]

5. avatar (i.e. profile image)

All profile fields are supported. See the above substitution tutorial for usage information.