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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Funny Invoice Numbers ...
Small and medium business | Business Central, N...
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Funny Invoice Numbers generating

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Posted on by DebbieG 544
Hi, I have a client that occasionally when they raise a customer invoice, the system is generating weird invoice numbers. See below screenshot. I honestly have no idea where to start looking. I checked No series, nothing weird there. They don't have staff invoicing at the same time, it seems like the system cannot return the next number thus resulting in the below. Has anyone seen this before. Also seem to always happen to the same user.
 
Untitled.jpg
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Dynamics 365 Business Central
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  • Suggested answer
    Valentin Castravet Profile Picture
    Valentin Castravet 32,666 Super User 2026 Season 1 on at
    That's a strange one. It looks like its using the system id/GUID of the posted invoice as its number. How are these invoice created? Are the unposted orders/invoices created manually, or are they imported or created automatically somehow? Do you have any customizations that can affect orders/invoices?
     
    There's a similar thread here, so either someone is having the same exact issue or the question was asked in relation to the same customer. 
     
  • Suggested answer
    Mohana Yadav Profile Picture
    Mohana Yadav 61,214 Super User 2026 Season 1 on at
    Do you have any customizations in Preview Posting etc.? Please uninstall all custom apps and test.
  • Suggested answer
    YUN ZHU Profile Picture
    YUN ZHU 100,214 Super User 2026 Season 1 on at
    Hi, It seems to be related to the field I mentioned below.
    Dynamics 365 Business Central: Manual number for Posted Sales invoice and Posted Purchase invoice (Use the same number in Sales Order and Posted Sales Invoice?)
     
    But it doesn't seem to be added artificially. I think it is a problem caused by customization.
     
    Thanks.
    ZHU

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