The company's website is now inaccessible, but according to a copy of the CyberRebate.com homepage cached by Internet search engine Google.com, the company gave out more than $85 million in rebates since it was founded in 1998.
But the company may also have had a history of problems making payments.
Last August, Spitzer launched an investigation of the company when customers complained about not receiving their payments.
"Spitzer's investigation revealed widespread delays on the company's part in processing rebates and mailing checks," the website of the attorney general's office states.
"Online consumers expect and deserve the same level of service that exists with traditional stores," Spitzer said in the statement.
--Staff writer Elliott W. Balch can be reached at balch@fas.harvard.edu.