If you want to sign a PDF, this post talks of free tools that let you add a signature to PDF. Type or draw a signature using them.

Don't have a printer and scanner? You still can easily sign a PDF file, no matter the operating system you're running.

How to sign a PDF using Adobe Acrobat Reader Adobe Acrobat Reader, the most popular PDF viewing software, has an electronic signature method that works for both PCs and Macs.