Treasury department deputy inspector general for investigations Tim Camus said that the hoax is the ' largest , most pervasive impersonation scam in the history of the agency ' Scammers are calling 10,000 Americans a month posing at IRS agents and have already stolen $ 15.5million from 3,000 victims , including federal agents . ' Do n't disregard this information as delay in calling us back might end up in a legal matter for you , ' said the scam call message . Fraudsters supposedly tell the victims to withdraw money from their accounts , buy pre - paid credit cards and tell them the number .
Treasury Department deputy inspector general for investigations Tim Camus said that the hoax is the 'largest , most pervasive impersonation scam in the history of the agency ' Scammers are calling 10,000 Americans a week posing at IRS agents and have already stolen $ 15.5million from 3,000 victims , say federal agents . 'Do n't disregard this message as delay in calling us back might end up in a legal matter for you , ' says the scam call message . Fraudsters supposedly tell the victims to withdraw money from their accounts , buy pre-paid debit cards and tell them the number .