Should I change electrical panel before inspector sees

[Will Rodgers]

I'm flipping a house and my cointractor just informed me that my electrical panel is 60 amp and does not have a main breaker. It needs to be updated. He also says that I should do this before an inspector sees it. What are your thoughts on doing this without gettung the permit first? How often does that happen. Multiple people have said to update the panel Before an inspector sees it. Is there a way they can tell that I did it or do they usually not  even bother after the fact?...