Contact the educational institute that administered the test and issued the diploma. An old high school, vocational school or an adult education program are all examples of an educational institute.
Find out the procedure that's required to request your high school equivalency diploma. Some institutions may accept requests by phone, while others may only require that you write a letter requesting this documentation. Generally organizations have forms for you to fill out. These forms are normally available online at the organization's website or can be picked up in person.
Fill out the form. Provide all the information that it requests, which may include your full name at the time you took your test, date of birth and the year the diploma was issued. Sign and date the form.
Mail the completed paperwork to the address indicated on the form. If a fee is required, include it in the form of a check, money order or credit card number, depending on the requested method of payment. Once your order is processed, your duplicate diploma will be mailed to you.