Always shop at authorized investment gold dealers with a good reputation and guaranteeing the quality of the products they offer.
To protect yourself from counterfeiting, do not buy gold coins from the street or from random people unless you are 100% confident in your knowledge of gold.
Monitor the quality of workmanship. All real coins are extremely exquisite and detailed, something that cannot be achieved in conditions other than a state mint.
The authenticity of the gold coins is confirmed by 4 indicators: weight, diameter, thickness and detail of the workmanship.