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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / How to add Digital Sig...
Small and medium business | Business Central, N...
Answered

How to add Digital Signature in Business Central?

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Posted on by Aman Kakkar 2,938 Super User 2026 Season 1
Hi Community,
 
Requirement is straight forward - I want to add a column in the Approval Entries that stores the digital signature of the person who's approving the Purhase Invoice. Is it possible to do it in any way in Business Central using AL code without any third party integrations?

By "adding a new column in Approval Entry" means any type of column will work - be it blob, Text, etc. It's just I should be able to see the Digital Signature of the person who approved the invoice in the Approval Entries page/ posted approval entries page.
Categories:
Dynamics 365 Business Central
Microsoft Dynamics NAV
Dynamics 365 Business Central migration
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  • Suggested answer
    OussamaSabbouh Profile Picture
    OussamaSabbouh 9,762 Super User 2026 Season 1 on at
    Hello,
     
    You can add a custom field to Approval Entry and show a “signature” in pure AL, but Business Central has no native digital-signature capability. You can extend Approval Entry (table 454) with a Media/Blob/Text field, expose it on Approval Entries / Posted Approval Entries, and populate it at approval time (for example by copying a stored signature image from User Setup, or letting the approver upload one, or capturing a handwritten image via a simple control add-in). This works fine for displaying an approver’s signature image, but if the requirement is a legally verifiable cryptographic digital signature, that’s not possible without external signing services.
  • Verified answer
    YUN ZHU Profile Picture
    YUN ZHU 97,376 Super User 2026 Season 1 on at
    The simplest method is to save the Digital Signature as an image associated with the user in the system, and then print it out after approval.
    If you need something more complex, I've tried the following solution.
     
    Thanks.
    ZHU
  • Suggested answer
    Dhiren Nagar Profile Picture
    Dhiren Nagar 1,921 Super User 2026 Season 1 on at
    Hi,
     
    If you are talking about converting the crypted signature file into image, then only with AL it is not possible. You need to use any other tool or python or .Net based Azure functions which can convert the signature into text or image. Then you can use to save it in record with AL.

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