When looking for a new job, do you need to go through the resignation procedures of the foreign company?

Of course, if you don't have a resignation certificate, it may mean that you haven't left your previous company. If the next company hires you, there will be risks. However, some units are not necessarily. Since your current unit has it, just say that they have such a rule, then you must have it. As for scary things, you can go to work first and then do it slowly. It's up to you to negotiate with your original unit. If they don't agree, then you must do as they say.