Can I back out of it if I receive a better offer from another company? Our ATS has a build in feature so candidates can sign electronically.We've also built out templates for various types of roles. No. It's different from a formal "Contract" of employment. Those become legal and binding upon joint signatures. Yes, an offer (or any other contract) delivered via email is as valid as one sent on paper, and more valid than one delivered verbally. Follow these step-by-step instructions to create job-offer letters that reduce legal risks. Links to sample letters are included. The AA will contact the candidate to request a signed "Candidate Statement of. Authentication Regarding Qualifications and Background.