How to successfully detect tagging on Canadian stamps?

Phosphorescent...or fluorescent?
Phosphorescent...or fluorescent?

Some of the most frequent questions we receive have to do with tagged stamps. What is tagging? How can I detect tagging? What is the difference between phosphorescent and fluorescent tagged stamps? Winnipeg vs General tags? Many collectors have these stamps but are unable to differentiate them from the regular issues and that can be very frustrating.

 

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New Canada stamp commemorating Parks Canada

2011 Stamp commemorating Parks Canada Centenary
2011 Stamp commemorating Parks Canada Centenary

On May 19th, 2011, Canada Post began issuing a new stamp commemorating the 100th anniversary of Parks Canada, the first national parks service. Canada is a country covered with beautiful landscapes from one end to the other; it only makes sense that an organization be set up to protect these natural treasures and resources.

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