Document-backed accounting is the practice of keeping every transaction connected to the document that justifies it — and storing that document where the people working in the books can actually find it. It’s the difference between a clean general ledger that nobody trusts and a clean general ledger that you can defend in front of an auditor, lender, or partner.
Most operators store receipts and invoices in one place (email, a folder share, a phone gallery) and post the corresponding journal entries somewhere else (the accounting system). The two places drift apart almost immediately.
When a question comes in — “why did we pay this vendor $4,200 in March?” — someone has to reconstruct the answer by hand. The receipt might be in a Gmail thread, the invoice in a folder, the photo in a foreman’s text history, and the journal entry in the accounting tool. None of them point at each other.
In a document-backed system, retrieval is the primary use case. Pull up a vendor and see every document tied to them. Pull up an account and see the receipts behind every line. Pull up a property and see the entire repair and capital improvement history. The ledger and the document store are the same place.
Auditors, lenders, owners, partners, and tax preparers all ask the same question in different words: how do you know? A document-backed ledger answers that question with the original evidence. Detached document storage answers it with “let me get back to you” — which is when small problems become large ones.