DOW JONES NEWSWIRES 
 

Amazon.com Inc. (AMZN) added Hawaii to the growing list of states where the e-commerce giant is ending relationships with marketing affiliates to avoid collecting sales tax.

In the past few days, the company has also ended relationships with affiliates in North Carolina and Rhode Island and has made similar threats about California. Affiliates account for a relatively small slice of Amazon's traffic, so the move isn't likely to cause major damage to the company's business. It will continue to sell goods directly to consumers in the states through its own Web site and will still allow purchases from independent online merchants that sell through Amazon's site.

In an email sent to Hawaii associates, the company said their accounts would be closed as of Tuesday. "This is a direct result of the unconstitutional tax collection scheme passed by the Hawaii State Legislature with an effective date of July 1," the email reads.

The decision highlights mounting tensions between online retailers and cash-strapped states. Other states are considering similar laws that would use affiliates as a way to force companies to collect sales taxes for online purchases.

Forcing e-commerce sites to collect tax upfront would strip a key advantage they have over traditional retailers, though consumers are technically supposed to pay a so-called use tax for online purchases on their own.

New York passed an Internet-sales-tax law last year, which Amazon and Overstock.com Inc. (OSTK) challenged in court but lost. While they are appealing that ruling, Overstock has dropped its affiliates in the state and Amazon has begun collecting a sales tax in New York. Amazon shares were up 14 cents to $83.17 in recent trading and are up 62% so far this year.

-By Lauren Pollock, Dow Jones Newswires; 212-416-2356; lauren.pollock@dowjones.com