It depends on the type of passes you have and when you purchased them. Generally speaking it can be done at WDW, guest services at the parks or resorts but usually only within 14 days of first use. There are some exceptions and some upgrades but they can be pricey and often not worth it. Without knowing what type of passes you have, if they are used or how old they are its hard to answer.
I suggest posting your question with some details on the theme parks board there is a WDW CM who works in ticketing that often posts helpful information like this.
TJ