One of Bitcoin’s biggest drawbacks is a lack of standardized policy for chargebacks or refunds, as all credit card companies and traditional online payment processors have. Users affected by transaction fraud – for instance, they purchase goods that the seller never delivers – can’t request a refund through Bitcoin. In fact, Bitcoin’s decentralized structure makes it impossible for any single party to arbitrate disputes between users. While miners take responsibility for recording transactions, they’re not qualified to assess their legitimacy.