We put the error code behind a kind of message/dialog that invites the user to contact us if the problem persists and then report that code.

It’s my long standing wish to be able to link traces/errors automatically to callers when they call the helpdesk. We have all the required information. It’s just that the helpdesk has actually very little use for this level of detail. So they can only attach it to the ticket so that actual application teams don’t have to search for it.