Arbitrage Compliance Specialists, Inc. ("ACS") is an independently owned firm specializing in Arbitrage Services, including Rebate Reporting, Continuing Disclosure and more. Arbitrage Compliance Specialists, Inc. ("ACS") is an independently owned firm specializing in Arbitrage Rebate and Post-Issuance Compliance. Born out of PricewaterhouseCoopers, ACS' founders have been at the forefront of every advance and reform of the Tax Code since 1986.