If you download a PDF document signed through the Platform to your computer and open it in a PDF reader, the program will indicate whether the e-signature on the document is valid or you cannot verify its validity.
We recommend the free Adobe Acrobat Reader PDF reader for verifying e-signatures.
Adobe has its own online certificate store, which is automatically updated if the user has enabled it during installation. Internet is required to access the certificate store. If this is not the case, Adobe will not be able to verify the certificates and will send the following error message:
However, this does not necessarily mean that the signature is incorrect, but that it cannot verify the validity of the signature from Adobe based on the online certificate store.
How do I set up Adobe Reader?
You can download the latest version of Adobe Reader PDF reader for free here: https://get2.adobe.com/en/reader/
After downloading and installing, Adobe will immediately offer the following option: Update trusted certificates
Please check the "Install automatically in the future" option here and click OK.
After that, if the issuer of the signature is in the certificate store and the signature is valid, the following message will appear on the screen:
Open the Signature panel to access the details of all signatures: