Most businesses have unique shipping needs that are based on a variety of factors and limitations. Once you've decided which methods (and/or carriers) to offer, the only thing your shoppers need to do is choose a method when they place their orders. As part of the third-party fulfillment setup process a mapping must be created from each available shipping method option to a unique shipping code used by the fulfillment center.
To gather shipping methods from Volusion:
From within Volusion, click Settings > Shipping > Advanced Settings
Click on View All Shipping Methods
Sort by Active. The active shipping methods are displayed
The shipping method sent to the fulfillment center is the Shipping Method ID (not the Shipping Method name)