How to digitally sign a scanned document

Question

We have copiers and a large format scanner that can create PDF files. We would like to be able to affix digital signatures to these documents. The application is that we create plan sets for public construction projects and those are 'stamped' with a seal. We would like to start doing that electronically if possible. We have Adobe Acrobat Pro verson 8.

Answer 1

If you really want a digital signature, you can easily add one in Acrobat. I don't have Acrobat 8 to tell you exactly how you'd do it, but the Acrobat help doc should have more information. In Acrobat 9, you do it by selecting: Advanced > Sign & Certify > Place Signature
or: File > Save as Certified Document
You will first have to set up a digital identity. In Acrobat 9 you do this by selecting: Advanced > Security Settings > Digital IDs > Add ID
You can create digital signature appearances that get used with a digital signature. To configure one, select (again, Acrobat 9): Edit > Preferences > Security > Digital Signatures > Appearance > New (or Edit)
If you don't need all that a digital signature provides, you can use a stamp, perhaps a dynamic one, to add your seal. You can then flatten the page to convert the stamp annotation to regular page contents, preventing a user from altering it.