Installation & Delivery Confirmation — Captures proof that hardware, services, or implementations actually arrived and work — signatures, acceptance tests, go-live dates. That confirmation is the trigger conditional billing and revenue recognition both wait on before money starts moving.
Installation & Delivery Confirmation lives in the Fulfill & Activate phase of Fulfill & Bill — the stage where you activate what was sold, meter what's used, bill it right. In the corpus tool index this phase maps to the Entitlements and Billingcategories.
No product category maps cleanly onto this module yet — companies typically build it in-house or cover it with adjacent tooling. See who builds vs buys across the corpus.