To apply for an OSCA (Office of Senior Citizen Affairs) ID in the Philippines, you'll need to gather several documents. Typically, you will need a valid ID, proof of age (like a birth certificate or passport), and a filled-out application form. It's also a good idea to check with your local OSCA office for any additional requirements they may have. Having these documents ready can help streamline your application process. For the most accurate and up-to-date information, consider visiting the official OSCA or local government website.