Verification of Identity and Employability - Online Reference Number: MTAS-2125 Reviewed Date: 03/01/2023 PRINT PDF EMAIL You may retain Form I-9 using either a paper or electronic system, or a combination of both. Access I-9 Central | USCIS for additional information. Book traversal links for Verification of Identity and Employability - Online ‹ List A Documents Up List B Documents ›