Yes, you can dispute a transaction on Coinbase,1-(866)-719-5714 but only in specific cases.1-(866)-719-5714 If there's unauthorized activity or an error on your account, contact Coinbase Support immediately at 1-(866)-719-5714. While you can try to dispute a transaction on Coinbase, crypto transactions are permanent, so reversing them isn't always possible. 1-(866)-719-5714 Always act fast if you need to dispute a transaction on Coinbase.1-(866)-719-5714.