At least one signature has problems

PDF signature Problems

How to fix At least one signature has problems

Adobe Reader or Acrobat may display a "At least one signature has problems" message when you open a signed PDF. Here are some steps you can try to fix it:
  1. Click the Signature Panel button on the left side of the PDF
  2. Right click on the signature that has problems
  3. Click Show Signature Properties
  4. Click Show Certificate
  5. Open the Trust tab
  6. Click Add to Trusted Identities
  7. Click OK in the popup message
  8. Click OK in the Import Contact Settings panel
  9. Click OK in the Certificate Viewer panel
  10. Click Validate Signature
You can also try validating all signatures in the document:
  1. Click the Signature Panel button at the top of your PDF where the error is
  2. Press Validate All in the signature panel on the left
  3. In the pop-up that appears, press OK to validate all signatures in the document

How to validate digital signature in pdf

Here are some steps to validate a digital signature in a PDF using Adobe Acrobat:
  1. Open the PDF file
  2. Select the Signatures option on the left-hand panel
  3. Click the gray caret to open up a drop-down menu
  4. Check the signature's validity, time, and whether it's been modified
  5. Click Validate All then OK
You can also manually validate a signature:
  1. Select the signature
  2. Check the Signature validation status dialog box

If the signature status is invalid, you can contact the signer to resolve the issue. You can also set verification preferences, such as: Automatically validating signatures, Checking the revocation status of certificates, and Using expired timestamps.

How to make digital signature

Here are some steps for creating a digital signature:
  1. Write your name on a piece of paper with a ballpoint pen
  2. Take a photo or scan the signature using a smartphone, tablet, or scanner
  3. Crop the signature to an acceptable size using a smartphone editor or online photo editor
  4. If the signature file is in JPEG format, convert it to PNG format for use when signing digital documents

How to do digital signature in pdf

Here's how to add a digital signature to a PDF in Adobe Acrobat:
  1. Open the PDF document
  2. Select Tools in the top navigation bar
  3. Select Fill & Sign
  4. Select Sign Yourself
  5. Select Add Signature
  6. Type or draw your signature
  7. Select Done
  8. To add initials, select Add initials, type or draw your initials, and then select Done
  9. To move the signature, click the field to highlight it and then use the arrow keys

How to create digital signature

  1. Go to the CreateMySignature website
  2. Select Draw Signature
  3. Use your mouse or touchscreen to draw an image of your signature
  4. Use the eraser button in the top right to try again
  5. When you're happy with the signature, select Save
  6. Select Download to save a PNG version of your signature
  7. Drag and drop the signature image into a Word document or Google Docs file

How to verify digital signature in pdf

Here are some steps to validate a digital signature in Adobe Acrobat Reader:
  1. Open the PDF containing the signature
  2. Select the signature
  3. Click the red eSign
  4. Click Signature Properties
  5. Click Show Signers Certificate
  6. Click the Trust tab
  7. Click Add to Trusted Certificate

How to sign pdf file with digital signature

Here's how to add a digital signature to a PDF using Adobe Acrobat:
  1. Open the PDF
  2. Select Sign from the top toolbar
  3. Create your signature and initials
  4. Select Add signature
  5. Type or draw your signature in the dialog box
  6. Select Done
  7. To add your initials, select Add initials
  8. Type or draw your initials in the dialog box
  9. Select Done

How to use digital signature pen drive

A digital signature pen drive, also called a USB token, is a special USB token that can store digital signature files and sign documents. Here are some steps to use a digital signature pen drive to sign documents:
  1. Install software
  2. Log in and enter your user pin
  3. A dialog box will appear with your details, including your public key, private key, and digital signature certificate
  4. Open the document and look for the digital signature option in the menu
  5. Follow the instructions
  6. Enter your pin and select the certificate to authenticate the signature
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