I'm a Certified Public Accountant in the Philippines with almost 5 years of experience in Accounting, Audit, and Accounting Software (NetSuite).
Onlinejobs.ph "ID Proof" indicates if "they are who they say they are".
It DOES NOT indicate skill level.
ID Proof scores are 0 - 99 with 99 being the best. It is calculated based on dozens of data points.
It's intended to help employers know who they're talking to is real, and not a fake identity.