Document authentication through visit to issuing authority - Germany

We’re from employment screening company de risc group www.riscgroup.co. We wish to hire a freelancer who can visit the assigned place in order to authenticate the applicant's documents for employment screening purpose. For this assignment, the applicant's employment letter and authority letter will be provided. The freelancer is required to; 1- Visit the HR/Signatory authority of the respective organization 2- Get the given education form filled, signed and stamped by them 3- Capture the geo-tag pictures of the location