I am so far removed from that sort of thing that I honestly thought you were asking if you should get in touch with your SIM partner beforehand. And I did sign a bond 25 years ago when I was fresh out of training. Where I am now no company would (be able to) do that. I would prefer not work for a company that does that. In the EU none of the better companies do it. So, if there's no other way, I would, but it would only strengthen my resolve to leave.
More importantly, don't ask for legal advice on a free public forum, because you get what you pay for.