Boost your renewal rates with a foolproof membership renewal letter! Are you renting an apartment and need a rental reference letter?Optimize your member renewal letters to keep members coming back year after year. Read our how-to guide and download your free template. To request a recommendation or reference letter from President Dr. Salvador Hector Ochoa, please submit this form at least one month before your deadline. A Certificate of Occupancy is required for all businesses in the city. Learn more about applying for a Certificate of Occupancy. Doctor I shadowed asked me to write my own letter of recommendation. Does anyone have a good example or pointers on what to write? • HealthTexas Medical Group (San Antonio).