my experiences led me to having several certified copies
Solicitor/probate/... - okay
ATO / Centrelink / ... - okay
Lands office - okay
Hospital - grumble
Specialist(s) - grumble
Insurance - sigh
Superannuation - okay
Bank - fair enough (although why every teller in every branch in the country wanted one 🤯)
Barista - now you are taking the mick!