Restrict Poland employees from updating their names

Summary

We need to either restrict employees from updating their names or add approval whenever names are changed

Content

Poland has legal rules for employees to submit paper based application and proofs for changing their names. In order to ensure this is not violated, employees should not be able to change their names without submitting the paper signed application. So, we need to either restrict them from updating the names or add HR into approval flows when names are changed.

How can we put restrictions on employee names for employees? how can we add approval flow only when names are changed?