I know you asked the question of someone else but I have left and returned many times also, so here is my experience. I go on a little vacation anywhere, maybe even the US. I always buy a one way "onward" ticket for a date less than 29 days after the date I plan to return Cebu. Cebu to Singapore or Kuala Lumpur, usually is less than 60 dollars and once back here, I throw the ticket away. Twice I have boarded without being asked about an onward ticket but I never take the chance. I don't recall ever having been asked about an onward ticket upon arrival here. I have a friend from Norway that buys an onward ticket through Expedia on his day of returning to Cebu. Expedia allows cancellation withing 24 hours so he flies and then cancels the ticket after he gets here. He says he shows the email if asked for the onward ticket. I have not tried that, I buy the ticket and print it even before I leave here.