Signed lease agreements, payment receipts, bank transfers, invoices for installation and fit-out, supplier contracts, insurance certificates, and any personal guarantee. Pair each payment with proof of where the money came from and how it travelled. An account statement showing a balance does not, by itself, establish committed and at-risk capital.
Build a payment trail, not a folder
Arrange the records so each dollar can be followed from its lawful origin to the enterprise's account and then to a specific supplier, lessor, or contractor. Gaps are common in a first draft and can usually be supplemented with additional statements, contracts, or explanations. Note which documents are still outstanding and who can obtain them. If a payment came from a sale, a bonus, or a family transfer, gather the underlying proof for that event as well.
Compare the provisions governing appointments, spending, contracts and deadlock rather than quoting a single favorable clause. Review share registers, formation records, shareholder agreements, voting rights, and any intermediate entity before relying on a percentage alone.
A legitimate joint or company account needs an accurate explanation of rights and transfers. A buyer who sends only a bank balance and a listing brochure has sent the two least informative documents.