if I had a foreign coin that could potentially be an error what it go here? or in world coins? thanks.
I have posted all of mine in the Error Coins forum! Just make sure it's an actual Mint Error Such as this coin I submitted to NGC https://www.cointalk.com/threads/blank-planchet-israel-agora-1960-80.313363/
as soon as I can find where I put it half asleep I will list it. I just wanted to make sure I put it the right spot.
As a second thought, this forum would be more likely to tell you if it is a true "error" or not, whereas the "Foreign Coin" forum would know more about the particular coin. This might be one time that double posting would make sense.