Hi Julio. Since this site is hosted by an ancient coin dealer, screening of purchases from other sources is generally against the rules. That said, it is also not possible to definitely authenticate a coin just from a photograph. The idea is either to "know the coin, or know the dealer", or don't buy. There are many clues to look for, but it takes years of experience and handling actual coins to be certain about
fakes, especially well-made ones. You can trust ForumAncientCoins.com to only provide genuine coins, with a lifetime guarantee. Others may have more specific information about the
type of coin you are looking at, but it is not my
area.
Good luck!
Jimi (V-drome)
P.S. You can also look here at the known
fake coins in the
Forum Ancient Coins Database:
https://www.forumancientcoins.com/fakes/index.php?cat=6