To apply for Pag-IBIG membership as an OFW, you'll need to fill out the Membership Registration/Remittance Form (MRRF), which can be obtained online or from Pag-IBIG branches. You should also prepare necessary documents such as your overseas employment certificate (OEC) and a valid ID. Submit your application along with the required documents to the nearest Pag-IBIG branch or through online channels if available. Once your application is processed, you’ll receive your membership ID which will allow you to access various benefits. For detailed requirements and application steps, it's best to visit the official Pag-IBIG website or contact their customer service.