If you are an existing seller on Poshmark who already has listings live, and want to transition to use our dropship capabilities (e.g., DSCO, Rithum, ChannelAdvisor, CommerceHub), it is imperative that you have item SKUs loaded onto all of your For Sale items in order for your closet to be properly connected via any dropship integration. Please ensure that these are Item SKUs (loaded at the size / inventory level), not Listing SKUs.
You can add item SKUs by using our listing creation flow within the platform or using our Bulk Listings Actions Add Item SKU feature.