Learn how to ask for your employee to be excused from jury duty with our comprehensive guide and jury service excusal letter template. NOTICE: Disqualifications and exemptions can be claimed during the pre-registration process.You must apply to HCAD for any exemptions for which you qualify. You'll need to get a note from a registered physician or Christian Science Practitioner stating the doctor's opinion that you can't serve. The practitioner's signature; The Badge Number on your summons. Matthew Harris Law, PLLC – Civil Litigation Division. If you are not qualified to perform jury duty, you must submit proof of your disqualification to the Office of Jury Commissioner (OJC). You must submit the completed application and supporting documents to the appraisal district between Jan.