The Pre-Health Advising Center collects and submits letters of evaluation for all medical and dental school applicants who complete the HPAC evaluation. Please refer to the HPAC Application Instructions as you complete the form.SERVICE TO BE ISSUED ON (Please List Exactly As The Name Appears In The Pleading To Be. Served):. What is a TWU letter packet? Address in detail specifics of the educational criteria taking advantage of personal, first hand knowledge and experience with the candidate's work. Form, Reference Letter. I have read (or had explained to me) and understand the requirements concerning my responsibilities under the Houston Food. The application preparation and USCIS decision will vary depending on the facts at issue in your particular case. A certificate will only be issued to the original applicant or the applicant's designated agent. For your convenience, we have made some common housing forms available for your use.