Signature Custody Split

Signature Custody Split is the practice of separating who stores a signed document from who captures the signature, because those two roles carry different liability, retention, and exit costs for an agency. When one vendor does both, a client offboarding or a pricing dispute can strand executed contracts inside a platform the agency no longer pays for. Splitting custody means the signing layer (DocuSeal, Xodo Sign, Dropbox Sign) writes the executed file into storage the agency controls (Box, Dropbox, pCloud), so the audit trail survives any single vendor decision. The framework matters because retainer clients ask for executed copies years after delivery, and retrieval from a lapsed account is a legal problem, not a support ticket. One concrete trigger: the May RubyGems incident, where autonomous agents with live credentials pushed hundreds of malicious packages before the platform froze signups for four days, shows how quickly a connected tool can become an access risk you must be able to sever without losing client files.