The Proclamation for Suppressing of Pirates was also known simply as the Act of Grace, although not actually an Act of Parliament). It was a royal proclamation issued by George I of Great Britain on 5th September 1717.
It promised a pardon for any acts of piracy committed before the following 5th January 1718 to those pirates who surrendered themselves to the authorities before a deadline of 5th September 1718, was subsequently extended to 1st July 1719 by a second proclamation in December 1718. The proclamation also included bounties for the capture of pirates who refused to surrender themselves.
You can read the original text from The London Gazette of 13th September 1717 from The Gazette website, or download it in PDF format by clicking on the image:
