PDF Software - Validation Authority Online For Free

Update the document to Adobe Standards If the PDF was made in an older version of Adobe Acrobat, or some other form of file editing program, Adobe may have an issue validating the signature, as the document is altered once Adobe opens it, with the signature.

To validate the digital signature: Open the invoice PDF document in Adobe Acrobat Reader, and look at the notification bar at the top of the document window. If you see a green tick, the signatures have been validated.

If you don't have an account, you can sign up for free on the website. Upload the document that contains the electronic signature you want to verify. You can do this by clicking on the 'Upload Document' button on the dashboard. Once the document is uploaded, click on the 'Verify E-Sign' button.

How to validate PDF/A? Upload the PDF/A file you wish to validate by either dragging and dropping it into the upload box or by browsing for it on your computer. ... Click on 'Start' to begin the analysis for compliance with PDF/A standards. ... When the analysis is complete, the validation results will be displayed.

You may try the following steps and see if this helps: Right-click on the 'validity unknown' icon and click on 'Validate Signature'. You will get the signature validation status window, click on 'Signature Properties'. Click on 'Show Certificate..' Verify that there is a certification path.

In the signature Properties window click Show Signers Certificate button. Following screen will be displayed once you click on it. Once you click on OK button, following window will be displayed. ... Click Ok button in the following window. ... Once the certificate validation is done, you will get the following approval.

In the signature Properties window click Show Signers Certificate button. Following screen will be displayed once you click on it. Once you click on OK button, following window will be displayed. ... Click Ok button in the following window. ... Once the certificate validation is done, you will get the following approval.

Open the pdf file and Right click on the Question Mark showing the Validity Unknown. Click on Show Signature Properties. Click on Show Signer's Certificate & Select Trust. Click Add to Trusted Identities & Click OK.