1: Seller sold a Stolen account and was recovered by the original owner
Most of us are aware of this approach; the account market is rife with con artists these days. Statistics suggest that around 80% of the accounts on the market were stolen. Please accept my condolences if you have previously experienced this. I understand how you felt.

2: ACCOUNT RECALLED
This is the most typical tactic used by scammers. For example, suppose you spend $100 on an account. The original account owner (scammer) will contact customer service and claim that his account was hacked, and he will provide the developer with his id numbers, proof of purchase, receipt, and so on, in order for the developer to reclaim the account from you.

3: Refund in-game purchase
This technique of scamming is trickier, as it occurs after you purchase your account from another individual. First and foremost, that person earns money by selling the account to you. Then, after a few days, he will request a chargeback from the developer (let's suppose he recently purchased 6000 gems for $60 before selling the account to you). Simply because he has left the game and has not utilized all of the gems on his account. So he files a chargeback to reclaim his $60. As a result, the developer will ban his account, which is now your account because you only recently purchased it.

4: Creditcard chargeback
This will result in account banning as well. This happened because the original owner of the game account has used illegal services such as buying in-game currencies at a cheaper price compare to the price of the game developer (Top-up, recharge). How is this possible? It is because most of the Top-up services are using stolen credit cards from people. And after the real owner of the card found out someone is using their credit card illegally, they will issue a chargeback from the bank. Result? The game account that was using top-up service is banned. And if you just bought your game account from that person, your account is gone, along with your money.

5: account data is not deleted after buying
This is the trickiest of all. This means that after purchased your game account from a seller, and you received everything from id, password, recovery email, etc… And everything was great until a week later. You logged in and found out that someone has logged into your account and used all your in-game resources. This happened because of some mobile games, even after you already transferred your account to another person. Your data, it still hasn’t deleted from the phone yet. That means even the seller sold their game account to you, they can still log in from their phone. So, it is only safe to trade if you know the seller will delete the game data from the phone after trading the account to you.