ALBANY — The state’s top court is considering whether to reinstate a real-estate broker’s defamation claim against a rival business over anonymous comments posted on its Web site.

The comments accused Christakis Shiamili, head of Ardor Realty Corp., of mistreating his agents, failing to pay his bills, making racist and anti-Semitic remarks, and committing adultery.

Shiamili sued The Real Estate Group of New York, its chief operating officer and the employee who moderated the now-defunct Web site. The comments were posted for about three days in February 2008, lawyers for both sides said.