In the cases I'm aware of, there has been a combination of actions or specifically costs have been recouped for items that violated the regulation or rule, and in other cases they have worked with the party or the caucus officials to take further steps to ensure that there would be no further violations.
Evidence of meeting #39 for Procedure and House Affairs in the 41st Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was million.
A video is available from Parliament.