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Using the certificate/signing a pdf document

1. Open the pdf-document to be signed in Acrobat Reader (or Adobe Acrobat).


2. Click on 'Tools' on the menu bar in Adobe Reader (In Adobe Acrobat: Click on 'Sign' in the menu bar).


3. Select 'Certificates'. If the item isn’t shown on the screen, first click the the button 'Show More' [Picture 1]. Then select 'Digitally Sign' [Picture 2].
(In Adobe Acrobat: Select the item 'Work with Certificates' and then click on 'Sign With Certificate').


4. Now drag a rectangle with the mouse pointer to the place where the digital signature should be placed.


5. Select the corresporending certificate and click on 'Continue'.


6. To use the certificate the assigned password of the certificate must be entered here. With the option 'Block document after signing', you can ensure, that all changes by a third party will be visible (based on the date of the change). The digital signature is provided with the previously set up time stamp.

Please use the option 'Lock document after signing' only if it is the final drawing of the document, otherwise no further signatures can be applied.

In addition, you can optionally edit the 'Appearance' of the stamp here and use 'Review' to see how the document changes when the stamp is added. Please note the following points:

  • Your name as signatory will be displayed in plain text (please do not use a photo of your signature or sign by pen).
  • The date including the time is included.
  • Optionally, you can hide or show the logo and labels from Adobe Reader/Acrobat.

7. With the final saving oft he pdf-document, it is digitally signed. If the message appears that Adobe Reader wants to establish a connection with the timestampserver click on 'Permit'.


Continue reading:

To verify that an electronic signature is valid and that the document has not been manipulated or damaged, you need to check various points. You will find brief instructions for this here:

validate electronic signature


If you have any questions or problems, please contact the RRZK-Helpdesk