# Duplicate invoice checks for MYOB Acumatica

MYOB Acumatica has duplicate invoice checks built in. Pulsify checks every invoice for a duplicate, including bills keyed straight into MYOB Acumatica, and asks before approval.

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)

1. Open AP Preferences.
2. Tick Require Vendor Reference so the Vendor Ref. box is required for Bill documents.
3. Tick Raise an Error on Duplicate Vendor Reference Number. A new document with a Vendor Ref. already used is refused.
4. Tick Validate Document Totals on Entry so the user keys the invoice total.
5. 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. Full guide: https://www.pulsify.tech/how-to/stop-paying-a-bill-twice-in-myob-advanced/

## What Pulsify adds

1. Pulsify checks every invoice against earlier ones on invoice number plus supplier, tax ID or date.
2. Bills keyed straight into MYOB Acumatica count too.
3. A file identical to one already uploaded is held. A person can process it anyway.
4. A suspected duplicate asks the approver to confirm with Approve anyway.

Pulsify connects to MYOB Acumatica. We set up the connection for you.

What Pulsify does not do:

- Pulsify never matches duplicates on amount alone.
- A duplicate flag is a warning. The approver decides.

## 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.

## Sources

- https://help.myob.com.au/advanced/Docs/Published/UserGuide/AP_10_10_00.html

Source: https://www.pulsify.tech/duplicate-invoice-checks-for-myob-advanced/ (last checked 2026-10-19)