2 will not be found. Unless you violate the criminal law, the judicial department has the right to check all the accounts in your name.
If you work in an ordinary restaurant or supermarket, you don't report it and no one checks it. However, it should be noted that you can discuss with the store manager to put the overtime part on other time cards. This method is sometimes used in Japan, but it must be noted that it must be explained to the store manager and approved. Then every month I have to calculate whether time and work are coordinated. It is easy to get a lot of money in this way.
Where do you want to report the time? School or management? You can discuss with the store manager when you need proof of store income or time. But if you need open source to collect tickets, there is no way, and that cannot be changed. The general manager won't report it, because if he reports it, it's his own store that is in trouble. He arranged the time, so he also had a great responsibility.