GED Diploma and Transcript PDF Shows “Author: Unknown” Instead of Blue Ribbon

[kay_zin_8636]

Hello,

I have an official GED diploma and transcript PDF issued by GED Testing Service and certified by Parchment. The document states that when opened in Adobe Acrobat Reader 8.0 or later, it should display a blue ribbon indicating a valid digital certificate issued by GeoTrust CA for Adobe.

However, in Adobe Acrobat Reader 2019.008.20081 on Windows 11, the signature status shows “Author: Unknown”, and the blue ribbon does not appear.

Additional details:

The PDF is digitally signed and certified by Parchment

There is no invalid signature or integrity warning

Trusted Certificates in Acrobat only show Adobe Root CA entries

Internet connection is available

My questions are:

Can a valid GED/Parchment document show “Author: Unknown” in Acrobat?

Does the absence of the blue ribbon always indicate an invalid document?

Could this behavior be related to the Acrobat version or certificate verification settings?

How should this type of educational digital signature be properly verified in Adobe Acrobat?

I want to confirm that this is an Acrobat verification issue and not a problem with the document itself because I will be applying to a university soon and do not want to be questioned my credentials just because of this issue.

I will really appreciate anyone who helps me to solve this problem.

[MikelKlink]

Well, analyzing such issues without the PDF in question amounts to guesswork. Thus, please share that PDF if possible. 

One possibility: you mention that you test that file with an Acrobat Reader version from 2019. Have you made sure that thar program has updated the trust list data is validation relies on?

[kay_zin_8636]

 

I’m afraid I can’t share the PDF because it contains confidential information. However, as shown in the images above, Adobe Acrobat indicates that the validity of the document is unknown, and only two Adobe Root CA entries appear in the Trusted Certificates list.

How can I check whether GeoTrust / GED certificates are included or trusted on my system?

[MikelKlink]

Well, your first screen shot shows that neither the Adobe Approved nor the European trust list appears to be loaded. You may want to try and enforce loading them in the Acrobat settings. 

[kay_zin_8636]

Thank you for your suggestion. I’ll look into the trust list settings in Acrobat as you advised.

[kay_zin_8636]

Thank you for your insight and suggestion.

[kay_zin_8636]

Hello, 

I have an official GED diploma and transcript PDF issued by GED Testing Service. The document states that when opened in Adobe Acrobat Reader 8.0 or later, it should display a blue ribbon indicating a valid digital certificate issued by GeoTrust CA for Adobe.

However, in Adobe Acrobat Reader 2019.008.20081 on Windows 11, the signature status shows “Author: Unknown”, and the blue ribbon does not appear.

Additional details:

The PDF is digitally signed,

and the author cannot be verified.

There is no invalid signature or integrity warning

Trusted Certificates in Acrobat only show Adobe Root CA entries

Internet connection is available

My questions are:

Can a valid GED/Parchment document show “Author: Unknown” in Acrobat?

Does the absence of the blue ribbon always indicate an invalid document?

Could this behavior be related to the Acrobat version or certificate verification settings?

How should this type of educational digital signature be properly verified in Adobe Acrobat?

I want to confirm that this is an Acrobat verification issue and not a problem with the document itself because I will be applying to a university soon and do not want to be questioned my credentials just because of this issue.

 

[Amal.]

Hi there ,

Hope you are doing well, and thank you for the detailed explanation. I understand why this would be concerning, especially when you’re preparing to submit documents to a university. I’ll try to answer your questions as below:

1. Can a valid GED/Parchment document show “Author: Unknown” in Acrobat?

Yes, it can. “Author Unknown” in Adobe Acrobat does not automatically mean the document is invalid or altered. It simply means that Acrobat cannot match the signer’s certificate to a trusted identity on your local system. Many educational institutions use organization-level digital certificates rather than a named individual, which often results in “Author: Unknown” even when the signature itself is valid.

2. Does the absence of the blue ribbon always indicate an invalid document?

No, the blue ribbon appears only when all trust conditions are met, including:

• The signature is intact
• The certificate chain is valid
• The issuing CA is trusted by Acrobat
• Revocation status can be confirmed

If Acrobat cannot fully establish trust (for example, the issuing CA isn’t in Acrobat’s trusted list or revocation checking can’t be completed), the ribbon may not appear, even if the document has not been tampered with.

3. Could this be related to the Acrobat version or certificate verification settings?

Yes, very likely. Acrobat Reader 2019 is an older version and may not fully support newer trust lists or updated CA chains. Trusted Certificates showing only Adobe Root CA entries is normal; third-party certificates (like GeoTrust) are validated dynamically. If revocation checking (CRL/OCSP) fails or is blocked, Acrobat may show limited trust indicators.

Updating to the latest version (25.01.20997) of Adobe Acrobat Reader often resolves this, as newer versions have improved trust handling and updated CA integrations. Go to Help > Check for updates and reboot the computer once.

4. How should this type of educational digital signature be properly verified?

In Adobe Acrobat:

• Open the PDF
• Click the Signature Panel
• Check that the signature status says the document is signed and has not been modified
• View Signature Properties > Certificate Path
• Confirm that the certificate chains to a recognized CA (such as GeoTrust) and that there are no integrity warnings.
  
  

For universities, this is usually sufficient. Many institutions also independently verify GED/Parchment records directly with the issuing service rather than relying only on the visual ribbon indicator.

Hope this information will help.

~Amal

[kay_zin_8636]

Hi Amal,

Thank you very much for your detailed explanation — I appreciate you taking the time to clarify the Adobe trust behavior.

I understand that in general, “Author: Unknown” in Acrobat can be caused by local trust or revocation issues and does not always mean a document has been altered. However, my concern comes specifically from the verification instructions provided by GED Testing Service inside the document itself.

GED explicitly states that when the document is viewed using Adobe Acrobat/Reader version 8.0 or greater, a blue ribbon should appear, indicating that the document was certified by GED Testing Service with a valid certificate issued by GeoTrust CA for Adobe. The instructions also mention that if the transcript does not display a valid certification and signature message — and that “Author: Unknown” may indicate a self-signed or untrusted authority — the document should be rejected.

In my case, although the PDF shows that it is digitally signed and there is no integrity or invalid-signature warning, Adobe Acrobat also indicates that the document has been “modified.” This adds to my confusion, as I have not altered the file, and the signature panel does not indicate that the document integrity has been compromised.

Because of this explicit guidance, I’m trying to understand how to reconcile:

Using a supported Acrobat version (8.0+),

Having a document issued by GED/Parchment,

Seeing no invalid or tampering warning,

Yet still seeing “Author: Unknown,” no blue ribbon, and a “modified” status.

I would appreciate any clarification on whether this behavior can still occur with correctly issued GED/Parchment documents due to trust or compatibility limitations in current Adobe environments.

Thank you again for your help.

 

 

[Amal.]

Hi there,

Thanks for explaining the situation so clearly. I understand why this is confusing, especially since you’re following the instructions provided by GED Testing Service.

Here’s a simple explanation of what’s likely happening:

“Author: Unknown” does not mean the document is fake or altered. This usually means that Acrobat does not currently trust the certificate automatically on your system. Newer versions of Acrobat no longer auto-trust many older or third-party certificates unless they are added to the local trust store.

The “modified” message can be misleading. Acrobat may show “document has been modified” when:

• The PDF was opened or saved by a newer PDF engine

• Metadata or internal structure was updated by the issuing system

• The document was opened in a modern Acrobat version that interprets older signatures differently
  This does not mean the content was changed, especially if the signature panel does not say the signature is invalid or broken.
  
  

The most important check is the signature validity. If the Signature Panel shows:

• The document is digitally signed

• No warning that the signature is invalid or the document was tampered with
  then the document integrity is still intact.

~Amal

[kay_zin_8636]

Thank you for your help and detailed explanation. How can I check if GeoTrust is listed among the trusted certificates on my laptop? Currently, it only shows these two root CAs.

 

[Amal.]

Hi there 

You build a list of trusted identities by getting digital ID certificates from signing participants and certificate security workflows. You get this information from a server, file, or a signed document. For signing workflows, you can get this information during the signature validation process. For certificate security workflows involving encryption, request the information in advance. For more details please check the help page https://adobe.ly/3LbfYYU 

~Amal

[MikelKlink]

Adobe Acrobat also indicates that the document has been “modified.” This adds to my confusion, as I have not altered the file, and the signature panel does not indicate that the document integrity has been compromised.

Yes, but if you read the message in the popup, you'll see that the document has modifications that are allowed!

Certification signatures may allow certain changes to documents. For example, you'll often find official form PDFs to be certified but they'll still allow filling in those forms which is a change after all.

I'm a bit surprised, though, to see that a diploma certification signature allows changes, in particular if there is no additional approval signature confirming those changes.

[kay_zin_8636 · Accepted solution]

Hi

Thanks for the clarification. I actually updated my Trusted Certificate List a few days ago, and since then Acrobat has shown the document as certified by Parchment, signed by GlobalSign Atlas R45 AATL CA 2020, but not GeoTrust. No integrity warnings appear, and the allowed modifications are fine. 

So it appears the earlier confusion was due to an incomplete or outdated trust list in Acrobat.

Thanks again for your help!

[MikelKlink]

Hello @Amal. 

Trusted Certificates showing only Adobe Root CA entries is normal; third-party certificates (like GeoTrust) are validated dynamically.

Are you sure about this? After the first download of AATL and EUTL data, "Trusted Certificates" in my experience displays hundreds and hundreds of certificates, and that download is something Acrobat usually does very early after installation.

Trusting only Adobe certificates is an Acrobat behavior of pre-AATL times.

• Confirm that the certificate chains to a recognized CA (such as GeoTrust) and that there are no integrity warnings.

Beware, this sounds so easy, but properly verifying that some root certificate is by a "recognized CA" requires a relevant proficiency with security related technologies. Only because some certificate says "GeoTrust", doesn't mean it really is from GeoTrust.