...as it relates to E-Sign compliance
It appears you may have a fundamental misconception of ESIGN. It's the simplest of laws -- having no implementing regulations and no penalties. In effect, ESIGN creates a license to substitute electrons for wet signatures and paper documents. It's only purpose is to legalize e-signatures (without defining what is or is not an e-signature) and to recognize e-documents as the legal equivalent of paper documents. The devil's in the operational and risk management issues, and state contract law. ESIGN doesn't address these topics at all. At the end of the day, the only thing that matters is whether you will win or lose in court if you have to sue your customer to enforce the contractual agreements. Defendants will try to repudiate signatures, documents, and anything else that would cause a court to rule against you.