The Internal Revenue Service's whistleblower program appears to be gaining strength, as the federal tax agency recently paid out $38 million to an anonymous individual who was instrumental in the exposure of a corporation's tax-avoidance scheme. The names of both the informant and corporation have not been released, but those involved in the case say that the business involved is a Fortune 500 company. Further, the IRS refused to disclose how much it was able to recoup from the company's tax evasion activities, but given the allowance under the whistleblower program, estimates put the total around roughly $250 million. The IRS programs allows informants to collect anywhere from 15 to 30 percent of the tax amount for the information they provide. The payment is currently the second largest whistleblower payment under the program, which was enacted in 2007 to help the IRS find and prosecute individuals and businesses that failed to comply with federal tax law. In August, former banking executive Bradley Birkenfeld received the largest reward in history - totaling $104 million - after feeding information to the IRS about offshore tax evasion facilitated by Swiss banking giant UBS. The details Birkenfeld provided enabled the government to reach a settlement with UBS that required the bank to pay out $780 million for its activities. While whistleblower cases are becoming more prevalent, they typically take years to prosecute, in many instances due to the complexities of tax evasion schemes and the number of players involved. The most recent case was filed in 2008. However, IRS Commissioner Doug Shulman said in July that the agency is presently working on 10 whistleblower cases that are nearly complete, and trying to calculate the number of claims to be paid out.