If someone tries to use a debit card in a Canadian SwimOffice website they will receive the following error:

We have encountered a problem with your payment. LiveRun - CC Failed: $xxx.xx to Name:Declined:Service Not Allowed; please try again or contact support@teamunify.com!. Please contact support@teamunify.com immediately.

Currently debit cards do not work with our system in Canada. Please use an actual credit card instead. You do not need to contact Support.

See Also
Can I use a debit card for credit card processing?
New User Interface (UI) - Select a Credit Card/ACH/Check payment type