How To Write A Testimonial Letter For A Person . Before writing your recommendation or testimonial, ask the candidate to whom it should be addressed. Use the customer's name and include pictures, if possible. Job Letter Free Word Templates from www.wordstemplates.org Address the letter to your honor. the first few lines should include your full name, age, address, county of residence and telephone number. The template works as follows: This type usually includes a visual in the form of a portrait.