To renew your senior citizen discount for hotels in the Philippines, you typically need to present your valid senior citizen ID upon checking in. It’s a good idea to contact the hotel directly beforehand to understand their specific requirements, as they may have their own policies in place. Additionally, ensure your senior citizen ID is up to date, as expired IDs may not be accepted. For more detailed information, you can check with the Department of Social Welfare and Development or visit their official website.