To cancel an Interac e-Transfer with Scotiabank:
Login to Scotia OnLine or Scotiabank Mobile Banking
Go to Transfers > Interac e-Transfer
Click Show pending Interac e-Transfers beneath Continue
Find the Interac e-Transfer you want to stop. Under the "Stop Transfer" column, select the red X.
Choose the account into which your funds will be redeposited
Select Continue
Review your information, and click Confirm to stop the transfer.