NDP leadership candidate Mike Farnworth says BC Ferries is pocketing $1 million in profit from customers who won't be getting anything in return.
Last April, BC Ferries announced that after six months, pre-paid tickets and so-called Coast Cards would not longer be accepted.
But Farnworth says the practice is unacceptable for such a vital transportation link and ferry riders should at least be getting refunds for trips they paid for in advance before the rules were changed.
He said customers should have been offered a grandfather clause, allowing them to continue to use already purchased cards and tickets.
In the past, the tickets and Coast Cards were good for two years.
BC Ferries president David Hahn has said customers who provided an email address were notified about the change and that notices were posted on ships and in terminals.