At Port Angeles you may have a courtesy US customs check before boarding ferry to ensure you have a valid passport for entering Canada at Victoria. When you disembark ferry at Victoria you will pass through Canadian Immigration/Customs to enter Canada. Blackball ferry terminal at Victoria is a US portal so if for some reason you are inadmisable into Canada, you will remain within the bounds of the terminal and take next ferry back to Port Angeles. When you leave Canada at Victoria you will have a US Customs and Immigration check at the ferry terminal portal, then upon arrival at Port Angeles you will pass through a US Customs check point leaving ferry terminal.
At any US / Canada border crossing you do not go through US Customs to leave USA, nor do you go through Canadian Customs to leave Canada.
