ICCS is considered the authority on grading Canadian coins. Due to their geography in Toronto, Canada, they’ve accumulated plenty of experience at it. The ICCS determines the condition and authenticity of gold coins but does not provide estimations of value.
ICCS has been certifying coins since 1986. Their office is located on Yonge St. in Toronto; so unsurprisingly their understanding of the finer points of Canadian coins is often considered superior to NGC and PCGS. So collectors looking to inject an extra bit of authenticity into their collection will want to consider ICCS first.
Unlike competing services ICCS encases coins in a PET film envelope, which is then sealed in a flip-style envelope. A grade certificate is also included inside.