That's a good question.

I believe it would still go back on the preauth card. 

https://www.koodomobile.com/help/things-know-about-cancelling-koodo

Let me flag a rep

Thanks

Hi @JF11 

An automatic refund will not be issued for a credit balance under $5, however, you can schedule a call back with the virtual assist https://koo.do/Chat so that our Payment department can further assist.

Don’t understand the logic behind this policy. When Koodo owes former customers’ money, Koodo should refund the money regardless of the amounts!! Would Koodo charge the customers the balance if it is less than $5 after the customer cancels the service?

Thanks for your reply