How to reverse EFT reimbursement?

Hey there! I'm a somewhat new clerk to my ward (In Canada, CIBC). We recently accidentally send two EFT to the same person. I see there is a way to see reversed EFT but I'm not sure how we go about reversing one. Can anyone shed some light on this matter?

When my bishopric created duplicate EFT reimbursements to me last year, I just wrote a personal check for deposit back into the ward budget. It's the same as overpayment of an advance.