Adobe Acrobat may display a warning or an error indicating that the certificate is untrusted or unverifiable because it is a self-signed from an individual (the doctor).
This doesn't prevent you from printing, but the warning may cause confusion.
In most cases, you can still print the document despite the warning:
You can also add the certificate to Adobe's trusted certificates list. This avoids warnings and ensures smoother handling in the future.
To add the certificate to your trusted certificates list:
You can view PDF files on your ios or android device using either of the free links below:
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