I worked with four call centers already, to name them (e.g. Teletech, callbox, ventus, sitel) handling international account. I am an education graduate majoring in english and mathematics, I also worked with tutorial agency teaching both english and math.
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.