Free closed-months check

Find out if a number moved after you signed off.

Postlock scans your last 6 closed months for anything posted or edited well after its period was closed. Connect Xero read-only and it runs straight away, in about two minutes. No card.

What it scans

Every document dated inside a month you've already closed, but entered after that month was done - a backdated invoice, a correcting journal, a bank line synced in late. Each one is a number that moved after you'd already reported it.

It knows month-end doesn't finish at midnight on the 31st: anything entered within your normal close window (default 7 days, adjustable) is treated as routine close activity and left out. The next week is flagged as worth a look; beyond that is counted as drift.

  • Read-only Xero connection · nothing is ever changed
  • Your last 6 closed months, scanned in one pass
  • Respects your close window · routine close postings don't count
  • Every change named · the document, who posted it, when
  • A total £ figure · what moved, in one number
One passConnect, scan, done. No baseline snapshot needed.
postlock.co/drift-report/example
Example report · 6 months scanned · Mar–Aug 2026
6 documents posted well after their period closed £17,915 total
MonthDocumentPostedAmount
May 2026JNL-009241 days late8,650.00
Apr 2026BACS-447132 days late2,000.00
Jul 2026INV-229812 days late · worth checking725.00

An illustrative example; yours will show your own numbers.

Get yours

Run it on your own Xero. No card.

1

Run the scan on your Xero

Create a free account, connect Xero read-only, and the scan runs immediately across your last 6 closed months. About two minutes, including the Xero consent screen.

Run it on my Xero

No card. Read-only: Postlock is technically incapable of changing your Xero data. Every document it finds is checked against its own history in Xero first, so a later payment is never mistaken for a backdated entry.

2

Not ready to connect Xero?

Check one month without connecting anything. Paste the balance sheet you reported and a fresh one from Xero, and see which lines have moved since.

Compare two balance sheets

No sign-up, no connection. The comparison runs in your browser, so your figures are never sent anywhere.

Rather talk first? Book a 30-minute call - it's with me, not a sales team.

Read-only, and yours to disconnect.

Postlock connects to Xero read-only - it can never change your ledger. Disconnect Xero at any time and the access token is deleted on the spot.