The first time I heard the term "Promissory note" was on a blog that I was following in January 2007. The blog was Iamfacingforclosure.com.You can see an overview of this at caseypedia. Anyway I googled Casey serin Promissory note and found the comments from his "promissory note" post the date was January 5"th 2007. Read the comments some are hilarious, Promissory note post And now we have Brian Lenihan issuing Anglo Irish Bank with a Promissory note! You could not make this shit up.