You can cancel a transfer request from within your Robinhood account under History. Not all cancellation requests will be successful depending on which stage you're at in the process. You may need to contact your outside brokerage if Robinhood is unable to cancel the transfer.

You can typically cancel a transfer if the money has not yet reached your recipient.

Can I reverse a bank transfer - or can my bank? Online payments, like Faster Payments, transfer money in real-time. Once a payment has been made, you can't stop or reverse it. You have to go through the process of trying to get the money back from the recipient and rely on their cooperation.

Once a money transfer has been initiated from one bank to another bank, it is generally not possible to cancel or reverse the transfer unilaterally without the consent of the recipient.