Starbucks developed ethical sourcing guidelines in 2004 and uses third parties to verify conditions at its suppliers. The company says it has zero tolerance for child labor and requires farmers to provide a safe, fair and humane working environment. But the National Consumers League said Starbucks is misleading consumers by failing to disclose that its certification program doesn't guarantee ethical sourcing. The group is asking the court to stop Starbucks from engaging in deceptive advertising and require it to run a corrective ad campaign. "Starbucks' failure to adopt meaningful reforms to its coffee and tea sourcing practices in the face of these critiques and documented labor abuses on its source farms is wholly inconsistent with a reasonable consumer's understanding of what it means to be 'committed to 100% ethical' sourcing,'" the group said in its court filing.