An Illinois Affidavit as to Military Service is a document that is used in the state of Illinois to prove an individual's past or present military service. It is typically used to provide evidence of a veteran's eligibility for certain benefits or privileges, such as discounts or tax exemptions. There are two types of Illinois Affidavit as to Military Service: the DD Form 214 and the Illinois Veterans' Affairs Affidavit of Military Service. The DD Form 214 is a discharge document that is issued by the U.S. Department of Defense and serves as the official record of an individual's military service. The Illinois Veterans' Affairs Affidavit of Military Service is an affidavit signed by a veteran under oath that states the veteran's name, branch of service, date of entry into service, date of discharge, and type of discharge. Both documents must be completed and signed in the presence of a notary public.