In the Import Contact Settings window which opens next, check the option "Use this certificate as a trusted root".Select OK in the first dialog box after reading the instructions displayed.In the window, navigate to the Trust tab and select Add to Trusted Certificates.The row should state "The University of Texas at Dallas RSA". Select the row above the one with a warning sign in the new window.To do that, expand a signature and then the Signature Details section by clicking the arrows adjacent to them.However, you need to validate only one signature to remove this error. View all plans Learn more Track and manage electronic signatures. Easily scan and upload PDFs using the free Adobe Scan mobile app on your device. Your recipients can sign in a snap no downloads or sign-ups required.
Adobe reader signer pdf#
You will be able to see all the signatures which are causing the issue. Access Acrobat PDF documents and sign documents from anywhere, on mobile or desktop.
If you are the recipient of a PDF that was signed using a UTD-issued certificate, you will need to "trust" UTD's main certificate (the one all individual UTD certificates are validated against) in Adobe. Commonly, this is because the signer used the UTD-issued certificate they got by following CKCS #180: Digital Certificates. I received a PDF that has a banner at the top saying, "At least one signature is invalid". How do I fix this error? ExplanationĪdobe does not recognize the certificate used for one or more of the signatures in the PDF.
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