If you want customers to return to your site to buy more goods, you’d better make it easy for them to return goods.

As that point becomes increasingly clear to e-tailers, several start-ups are stepping in to help them process product returns. Outsourcing proponents and the vendors themselves say this will yield better customer service and reduce the internal work needed to integrate back-end and Web systems.

Naturally, some virtual merchants don’t want or need an outsourcer to manage their returns. But others say working with a vendor is easier than setting up return infrastructures or swapping data between online and back-end sales or ordering systems.

Starting in September, consumers who buy branded apparel, collectibles and home decor at www.coca-colastore.com will have the option of making returns at kiosks at Mail Boxes Etc. franchises.