A custody report without a cut-off note forces every reader to guess when balances were frozen. For offline wallets, that guess is expensive: devices may have been sealed days before the ledger posted.

Write the cut-off as a dated sentence that names the inventory source (vault count, attestation pack, or extract), the timezone, and whether pending internal transfers were included. If two entities share a vault session, say so.

When our desk reconciles a close, the memorandum repeats your cut-off verbatim. If yours is missing, we cannot invent one — we list it as an open item.