I couldn't find any obligations. Its probably a good idea to keep your PIN secure to reduce the probability of ID fraud. As far as I can tell its a state backed

I couldn't find any obligations. Its probably a good idea to keep your PIN secure to reduce the probability of ID fraud. As far as I can tell its a state backed digital signature and authentication system so wouldn't confer any obligations. However, there is some discussion about whether its a completely new legal status which would do things like make you liable for double taxation. Personally I find that highly unlikely, but IANAL, YMMV etc.