Dunkin Donuts faces lawsuits after overcharging NY and NJ customers almost $15 million. Hit the jump for the whole story.

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Dunkin Donuts may be in deep trouble.

They mistakenly charged sales tax on prepackaged coffee in Fort Lee, NJ and both prepackaged coffee and bottled water in Manhattan. Three total customer complained on Monday.

Lawyers estimated that this mistake repeated many times, adding up to almost $15 million in overcharges.

Folks, check your receipts. Make sure prepackaged products do not have sales tax on them. If they do, ask for your money back and a new transaction. Charging sales tax on prepackaged food is illegal.

Source: NY Post