My Filipino wife and I have traveled to the Philippines many times. We’ve never been asked for any supporting documentation. We have never even had to ask for the Balikbayan benefit. They always automatically give us one year. Since my wife became a dual citizen, she always travels on her U.S. passport. She never brings her Filipino passport. When your wife becomes a dual citizen and travels with a U.S. passport, you’ll notice that her U.S. passport includes her “Place of Birth.” When she travels that way, she will automatically get a one-year stay. If she travels on her Filipino passport, of course she’ll get an unlimited stay. Still, if she’s not a dual citizen, it would be a good idea to have a copy of your marriage certificate in case you run into a cranky Filipino immigration officer.