These days, more and more official papers are being turned into PDF documents. (PDF stands for Portable Document Format; it is a standard created by Adobe in the early 1990s that allows paper documents to be turned into exact digital copies.) In fact, hard copy paperwork is fast becoming the exception rather than the rule. However, even digital documents have to be signed. You can do it the long way \u2014 print those documents out, sign them, and then scan them back into your computer \u2014 or you can create a digital signature and place it directly on the PDF.<\/p>\n