Verification of a PDF eCO via Acrobat Reader

Description :

This verification method only applies to PDF format eCOs and can be used to verify their authenticity as soon as they are opened with the Acrobat Reader programme: the digital signature will appear in green if Acrobat Reader recognises it is as valid.

Example 1: an unrecognised signature (Acrobat Reader not configured or poorly configured)

One can’t know whether the signature is authentic or not.

Example 2: an authentic signature (Acrobat Reader is configured)

The document is definitely authentic and not altered.

Example 3: an invalid signature (Acrobat Reader is configured)

The document is definitely false (forgery attempt).

Advantages/disadvantages :

Compared to the online verification, this method offers the advantage of being immediate, but it requires configuring the Acrobat Reader programme on your workstation.

Procedure to follow :

The procedure to configure Acrobat Reader requires version Adobe Acrobat Reader DC of this programme.

If you don’t have this programme, you should first download it and install it on your workstation (e.g.; from the Adobe website at

Launch the Acrobat Reader programme on your station (double click on its icon, starter menu, etc.).

Go to the “Edit” menu and then “Preferences”.

In the “preferences” window that opens, place your cursor over the trust “manager” category (on the left) and thick the two checkboxes “load trusted root certificates from an adobe server” then click the two buttons “update”.

Close and restart Acrobat Reader. You are now able to verify signed PDFs !

The PDF should be detected as valid based on the following three verification components:

- A signature appears on the last page of the document, with a green code.

- The notice “signed using valid signatures” is displayed in a banner under the toolbar.

- The signature has been affixed by an organisation called “CIVC”.

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