Learn how to write an authorization letter, granting permission to someone to act on your behalf in a legal or formal capacity. Please note that degree verification letters will not be provided.The IBHE has statutory authority to oversee all private business and vocational schools in the State of Illinois. The notarized transcript or diploma can then be sent to the Secretary of State's office for an Apostille or Certificate of Authority. If you opened your account with cash or check, a check will be mailed to the address indicated in the letter.