The Arizona Supreme Court has ruled that a Connecticut law firm with no lawyers licensed to practice in Arizona can nevertheless be the target of a malpractice claim from two Grand Canyon State residents. But the ruling is not likely to curtail the practice of law firms writing opinion letters for out-of-state clients in tax matters, according to legal experts.

In exchange for a $50,000 fee, Bridgeport-based Pullman & Comley and partner D. Robert Morris prepared an opinion letter for Arizona plaintiffs Bill and Sue Beverage some 13 years ago. The letter opined that it would be legitimate under federal tax law for the Beverages to take advantage of a tax shelter known as a custom adjustable rate debt structure.