Previous service can be certified from official employer records, or records of the Department of Audits, or State Board of Education, or Board of Regents, or in their absence 3 affidavits from 3 reliable people certifying to the member having rendered the requested years of service and some type of printed matter, such as a contract, school annual, or newspaper article.
Ga. Comp. R. & Regs. R. 513-5-1-.27
O.C.G.A. Sec. 47-3-26.