Quill MD Fiona Harris confirmed Puckey, who set up Quill with Harris in 2000, had parted company with the firm last week but declined to comment further.
Puckey could not be reached for comment.
Formerly at City and investor relations specialist Biddick Associates' financial services division Biddick Harris, Fiona Harris split the firm in 2000.
It was rebranded as Quill Communications and Puckey was hired from Biss Lancaster Financial as a founding director.
While at Quill, Puckey handled PR for Investec Asset Management and Swiss Life UK. At Biss Lancaster Financial, his clients included Royal & SunAlliance.