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Small and medium business | Business Central, N...
Answered

Unexpected Auto-Creation of Credit Memos after posting Purchase

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Posted on by 84
One of our customers is experiencing an odd behavior: sometimes, when they post a Purchase Invoice, the system immediately and automatically creates a Credit Memo to offset/cancel that Purchase Invoice.

As you can see, the Credit Memo document number directly references the same Purchase Invoice.


As you can see the credit memo was posted right after the Purchase Invoice was posted:




 

We’ve encountered this issue a couple of times before. On a recent occasion, we identified that the Credit Memo was automatically generated because a prepayment invoice exceeded the amount of the posted Purchase Invoice. However, this does not appear to be the case in this scenario.

 

Do you have any insights into why the system might be auto-creating these Credit Memos after posting a Purchase Invoice?

I have the same question (0)
  • Yi Yong Profile Picture
    2,704 Super User 2026 Season 1 on at
    Hello,
     
    Do you have any third-party extension installed?
    I don't recall there is standard behaviour to auto-create credit memo.
     
    On top of that, the Document No and External Document No. of the credit memo is too suspicious and not something standard behaviour practice.
  • Suggested answer
    Tech-Lucky Profile Picture
    1,288 Moderator on at
    This appears to be a customization. Please check the PTE installed extensions, uninstall them in the Sandbox environment, and then test the scenario to confirm.
     
    or if you have source code you can check with the developer or partner.
  • Verified answer
    Maylon Perez Profile Picture
    84 on at
    Hi All,
     
    Thank you for your response.
     
    After multiple tests and troubleshooting I was able to find the cause of this behaviour.
     
    They issue was because they used the Prepayment Account that was setup in the Advance Prepayment setup  (extension), so the system was expecting to apply this PI with a prepayment invoice and as they didn't make any prepayment, it got reverted with a credit memo after the PI was posted
  • Suggested answer
    Sohail Ahmed Profile Picture
    11,173 Super User 2026 Season 1 on at

    Business Central does not automatically create a Purchase Credit Memo unless there’s a specific setup or process driving it. The most common causes are:

     
    • Prepayment mismatch: if the prepayment applied is higher than the actual invoice, the system offsets it with a credit.
    • Workflow or extension: a custom extension, integration, or workflow may be triggering auto-reversals.
    • Posting setup issue: check if there are any automatic reversal settings or custom posting routines in use.
     

    I recommend reviewing the affected entries in the Posted Purchase Credit Memo and G/L Entry to trace the exact source. If it’s not prepayments, it’s very likely tied to a customization or add-on.

     

    ✅ Mark this as the verified answer if helpful.

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