A duplicate invoice check stops the same supplier bill being entered and paid twice.
What MYOB Acumatica does on its own
Option to raise an error on a duplicate vendor reference.
What you need in MYOB Acumatica
- AP Preferences (AP101000) access
Setting it up in MYOB Acumatica
Where to find it: Finance > Accounts Payable > AP Preferences (AP101000)
- Open AP Preferences.
- Tick Require Vendor Reference so the Vendor Ref. box is required for Bill documents.
- Tick Raise an Error on Duplicate Vendor Reference Number. A new document with a Vendor Ref. already used is refused.
- Tick Validate Document Totals on Entry so the user keys the invoice total.
- Tick Require Approval of Bills Prior to Payment if payment needs a second look.
Good to know in MYOB Acumatica
- The check works on the Vendor Ref. text, so a re-typed number will pass.
- Hold Documents on Entry keeps new bills On Hold for checking.
- Test the setting with a few rows before you rely on it.
How to do it in MYOB Acumatica
How to stop paying a bill twice in MYOB Acumatica
Before you enter a bill in MYOB Acumatica, search the vendor's bills for the same number or amount. Use one reference format and check the Prepare Payments for repeats.
What Pulsify adds
- Pulsify checks every invoice against earlier ones on invoice number plus supplier, tax ID or date.
- Bills keyed straight into MYOB Acumatica count too.
- A file identical to one already uploaded is held. A person can process it anyway.
- A suspected duplicate asks the approver to confirm with Approve anyway.
Pulsify connects to MYOB Acumatica. We set up the connection for you. More about duplicate invoice checks in Pulsify.
What Pulsify does not do
- Pulsify never matches duplicates on amount alone.
- A duplicate flag is a warning. The approver decides.
More help
- Duplicate invoice checks for Business Central
- Duplicate invoice checks for Sage 200
- Duplicate invoice checks for Sage 300
- Invoice fraud checks for MYOB Acumatica
- Line item coding for MYOB Acumatica
- Multi-entity accounts payable for MYOB Acumatica
- All MYOB Acumatica how-to guides
Sources
Last checked 2026-10-19.
Common questions
Will MYOB Acumatica refuse a repeated supplier invoice number?
Yes, if Raise an Error on Duplicate Vendor Reference Number is ticked in AP Preferences. A new document with a Vendor Ref. already used in the system is refused.
Does the duplicate check cover bills with no number?
No. The check is on the Vendor Ref. text, so a bill with no reference cannot be matched. Tick Require Vendor Reference as well, so a Bill document cannot be saved without one.
Why do duplicates happen?
The same invoice arrives by email and post, a supplier resends it as a reminder, or two people enter it. A statement can also be keyed as a bill.
Pulsify setup guides
Want this done for you?
Book a call to see how Pulsify handles duplicate invoice checks in MYOB Acumatica.