CLICK "READ MORE" FOR LIST. · A free tool to electronically sign PDF files can be found here: https://acrobat.adobe.com/link/tools/?x_api_client_id=adobe_com&x_api_client_location=combine_pdf&group=group-sign Checklist of REQUIRED documents : r Employment Application · Applications for employment are electronic and can be found here: https://www.bartoncenter.org/the-barton-center-overview/hiring/ r 3 completed references o INTERNATIONALS: Send your visa reference letters. We need three references, so if you don’t have enough, please ask someone for another letter of reference. r Signed Offer Letter r Completed CORI Paperwork r Out-of-State background check (for non-Massachusetts residents) o INTERNATIONALS: Send your visa background check results. r Completed Federal W-4 Tax Form ...