To avail of senior citizen discounts on movie tickets in the Philippines, you generally need to present a valid senior citizen identification card issued by the government. This ID serves as proof of your age and eligibility. It's also a good idea to check with the specific cinema for any additional requirements they may have, as policies can vary. Keep in mind that discounts typically apply only to regular-priced tickets and may not be valid for special screenings or promotions. For the most accurate information, consider visiting the cinema's official website or contacting them directly.