Electronic Record is as good as "in writing"
This is under section 5 of the Electronic Transactions Ordinance.
If a rule of law requires information to be or given in writing or provides for certain consequences if it is not, an electronic record satisfies the requirement if the information contained in the electronic record is accessible so as to be usable for subsequent reference.
If a rule of law permits information to be or given in writing, an electronic record satisfies that rule of law if the information contained in the electronic record is accessible so as to be usable for subsequent reference.