Looks quite interesting.

Those OFW fare prices and details can be found here

The documentation is tied up with the fare and validated at check-in.
You'd need to be a genuine and registered OFW with a definite Contract Number.

Passengers will have to provide their passport and contract number to be eligible for this fare. These documents need to be presented upon check-in at the airport, otherwise they will need to purchase a new ticket at full fare.
The details would suggest the offer is not available for dependents. Only for OFW's