Duplicate payment is when the same supplier invoice is entered or paid more than once. It often happens when an invoice arrives by two routes.
Before you start
- Preference access
The AccountRight way
Where to find it: Setup > Preferences > Purchase > Warn for Duplicate...Numbers on Recorded Purchases
- Go to Setup > Preferences and turn on Warn for Duplicate...Numbers on Recorded Purchases.
- Use the supplier's invoice number as the purchase number so a repeat is caught.
- AccountRight warns if a purchase number is used again.
Limits in AccountRight
- The warning is on the purchase number only. It does not check supplier plus amount.
Good to know in AccountRight
- There is a help page for supplier overpayments and double payments.
The Pulsify way
- Forward the supplier's invoice to Pulsify.
- Pulsify compares the invoice number with punctuation and case ignored, plus the same supplier card, invoice date or tax ID.
- It checks other Pulsify documents and active bills in AccountRight.
- A possible duplicate is flagged. Open the match, then reject or approve anyway.
Pulsify connects to MYOB in one click. Approved bills are created in MYOB with the source file attached.
What Pulsify does not do here
- Pulsify flags. You decide.
- A duplicate with a quite different invoice number may not be found.
Example in AccountRight
Example Plumbing Supplies sends invoice INV-5521 by email and again by post. You use the invoice number as the purchase number.
| Line | Amount | Tagged to |
|---|---|---|
| First bill, purchase number INV-5521 | $1,320.00 | Recorded |
| Second bill, purchase number INV-5521 | $1,320.00 | AccountRight warns the number is used again |
The warning stops the second entry before you pay. Paying both would cost $1,320.00 twice.
Common mistakes
- Using your own number instead of the supplier's invoice number as the purchase number.
- Assuming the warning checks supplier and amount. It checks the purchase number only.
More help
- How to stop paying a bill twice in MYOB Business
- How to stop paying a purchase invoice twice in Sage 50
- How to stop paying a bill twice in Xero
- How to apply a supplier debit to a bill in AccountRight
- All AccountRight how-to guides
- Pulsify setup guides
Sources
Last checked 2026-10-19. Confidence: confirmed.
Common questions
How do I turn on the duplicate warning?
Go to Setup > Preferences and turn on Warn for Duplicate...Numbers on Recorded Purchases.
What does the warning check?
The purchase number only. It does not check supplier plus amount. Use the supplier's invoice number as the purchase number so a repeat is caught.
What if I have already paid twice?
AccountRight has a help page for supplier overpayments and double payments. Start there.
What does Pulsify check?
The invoice number with punctuation and case ignored, plus the same supplier, invoice date or tax ID.
Pulsify setup guides
Want this done for you?
Book a call to see how Pulsify handles supplier bills in AccountRight.