Hidden Cert Annotation and Accessibility Checker

[captivating_idea4536]

I created a simple "Hello World!" tagged PDF and added a hidden sign cert. It ended up as an annotation as expected.

Now, when I ran accessibility checker on this document, it complained.

Exact complaint: https://helpx.adobe.com/acrobat/using/create-verify-pdf-accessibility.html?trackingid=KACNN#TaggedAn... 

Now, I am not sure why?

Adobe Acrobat Pro version: 2024.003.20112 64-bit

[captivating_idea4536]

When I say hidden, I mean invisible.