europe

They can and will send you to prison if they ask you for the passwords to a machine and you claim to have forgotten it. This will be determined by a jury though and how they react to that is going to be different depending on whether we're talking about a phone you use every day or a machine that's been sitting in your garage for 10 years. Prosecution will use your behaviour throughout the rest of the interactions you've had with them as a significant part of painting you as lying and concealing the password.

"RIPA section 49" is key phrase you need if you want to look into this.

https://www.oblaw.co.uk/being-served-with-a-s49-ripa-notice/