When you initially place your order you are given an estimated cost of that order. Then a pre-authorization in the amount of the order estimate is held against your credit card.
This pre-auth is to make sure it is a valid card and that you have enough room on it for the estimated amount of the order. It does not charge your card at that time; it only saves a spot on your card for the estimated amount.
Once the order is delivered, you will need to log in to eStrataHub at login.apicanada.com. Under the Services tab on the upper left choose eStrataHub for documents in BC or eCondoHub for documents in Alberta, go to Manage My Existing Orders, select Details for the order in question and click Complete Payment.
It is then that the final amount of the order will be charged to your credit card and the pre-authorization amount will be released from your credit card (in 1 to 5 business days depending on the financial institution).