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- You can add only a digital signature to documents sent in either the PDF, PDF (Trace), PDF (Compact), PDF (OCR), XPS, XPS (Compact), or XPS (OCR) file format. You cannot add a digital signature to documents sent in the TIFF or JPEG format.
- If an error occurs when sending a multiple page PDF or XPS document with a digital signature, the document will not be able to be opened by the recipient.
- If you select to add both a device signature and user signature, the device signature is added before the user signature.
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- If the recipient verifies a PDF that has had both a device signature and user signature added to it using software that supports the PDF format (such as Adobe Reader/Adobe Acrobat), only the user signature can be verified. The device signature causes the document to be handled as if it has been altered.
- If you change the file format to a format other than 'PDF' or 'XPS' after setting to add a digital signature, a message confirming whether you want to change the file format is displayed. If you change the file format, the digital signatures you have set to add are canceled.
- For information on validating certificates, registering certificates in the trusted certificates list, and verifying signatures on the recipient side, see the documentation for the software that supports the PDF format (such as Adobe Reader/Adobe Acrobat) or the XPS format (such as XPS Document Viewer).
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