First, check your phone inbox for the text message from the Pag-IBIG Fund with your RTN.  If you could print or save a copy of your MDF, you could also find your RTN in the upper right corner of the document (see the image below).  Call the Pag-IBIG hotline at 724-4244 for assistance if all else fails. If you live or work near a Pag-IBIG office, you may also inquire about your RTN there. Present your valid ID or birth certificate, which the staff will use to check your membership record.