Completeness
A filing cabinet can tell you what's in it. It can't tell you about the utility bill that never arrived, because a bill that didn't come has no transaction to notice. And that's the one that costs you.
Account Coverage
Connect a bank or card account and Global Office: Sync holds every charge up against the receipts, bills and invoices it already has. What comes back is the list of charges with nothing behind them.

A bookkeeper doesn't hold their clients' bank credentials, and shouldn't have to. The client makes the connection, and there are two ways to do it.
The bookkeeper works the list but doesn't just read it. They can attach the paper, explain a charge or ask the supplier for a copy, and every decision is recorded under their own name in the Audit Trail.
Getting the paper you're missing
When the app notices a subcontractor has no W-9, or that a certificate of insurance has run out, the card that tells you carries a button that asks them for it. Their name, their email and their phone are already filled in, out of your own paperwork.
And the message is already written, in words that fit the reason: a certificate that expired, one that's about to, one that never covered the work, one reissued with less cover than the last, a 1099 you're getting in order, a quote nobody came back on. It hands the finished thing to your own email or messaging app, or sends it for you under your name, so it goes from you rather than from a robot. Change a word of it or send it as it stands.
You don't have to type anything. That matters because chasing paper is the job almost nobody does until it's too late, and the reason is never that it was hard. It's that it was unpleasant to start.
Asking a client for documents · Global Office: Sync
A client on Contractors or Solo Edition sends you their work as it happens. For everyone else, make a link and type what you need. They open it on their phone and add photos or PDFs, with no account, no password and nothing to install. Every link expires, and you can withdraw one at any time.
Global Office: Sync can send it for you as a finished email with a Send your documents button on it, in your name, and replies come straight back to you. Or copy the message into a text and send it yourself. The message is exactly what you typed, with the link under it.
Every document is scanned the moment it arrives, and none of it goes into the books until you have looked at it. Once everything sent has been dealt with, the request closes itself.