Two lists → what does not match
Compare them. Check the exceptions. Download it.
Paste or upload two lists that should agree - a bank statement and your books, invoices and payments, a signup list and a payment list, a count and what the system says. You get back what is missing from each side and what matches but disagrees. You check every exception before you download. Nothing is final until you say so.
The two sides do not need the same format or the same column order. Fair use: about 60,000 characters across both lists per job. If this is a monthly close that never gets easier, that is a project - email hello@steverolfe.co.
Both lists are processed to build your result and are not stored after your session.