Removing ability for a User to add additional records

[JoeSymons]

I'm are looking for a solution where a User may create a new record, in this instance, asking for access to a folder. We want the User to be able to make the request for that folder, but not be able to add additional requests either for themselves or for others. Yet on the second page (table) which shows their request they have the option to 'add' as a link. 

How can I remove this? 

[Steve · Accepted solution]

Use an expression for the Show? setting of the column that hides the column if the user has at least one request.

[SkrOYC]

Add is a system created action that has a Conditional in order to prevent it from showing.

You can add an expression that checks if there is already a record in order to hide it