No, you can’t cancel a transfer once it has been sent, and the recipient can not decline it either. However, if your friend does not have a Wingocard account, the transfer won’t be completed, and money won’t move out of your account. For more information on transferring money to non-Wingocard users click here.
What if I sent a Wingocard transfer to the wrong person?
A transfer can’t be undone once it is complete but you can message your friend and ask them to transfer it back.