Rabbi Michael J. Broyde - [page 43-45 Journal of Halacha]
5. A Jew is knowingly and intentionally cheating on his United States taxes. May one inform on him to the Internal Revenue Service? According to the view of Rabbi Waldenberg, such conduct government.is permitted because informing is not wrong to a just government. According to Rabbi Batzri, such informing is prohibited and makes the informer a pursuer, as it will land the tax cheater in jail, and that is prohibited. According to Rabbi Wosner, although such conduct is not informing, it is prohibited under the rubric of doing gratuitous harm to another,and would only be permitted when the informer stands to benefit concretely from the arrest,94 or when it was one's job to detect such people or when being silent leads to desecration of G-d's name or informing leads to a sanctification of G-d's name, in which case informing is mandatory.95 According to Rabbi Feinstein, such informing is prohibited and makes the informer a pursuer (unless this conduct is one's job, and if he did not do it, someone else would and the person would be detected
94. Such as when the government knows about the cheating and actually suspects the informant of being the cheater. 95. See Shulchan Aruch Choshen Mishpat 266:1. 96. Rabbi Shmelkes' view is hard to determine. Cheating Medicaid or Medicare would seem to be no different than cheating on taxes. Consider a simple case of a doctor who is in a medical practice with another doctor who is forging the first doctor's signature on Medicare reimbursement forms; may the first doctor inform on the second? This case is relatively simple as informing is the only certain way the first doctor can preserve his own Medicare rights. He is informing for direct personal benefit, and thus such conduct would be permitted, even more so since Medicare fraud only very rarely results in jail sentences. A much harder hypothetical involves a Jew who is involved in non-violent criminal activity with a group of Jews and who – alone – is caught by the police. The other members of the criminal ring are not caught and their identities are still unknown. The District Attorney offers this defendant a deal, in which if he reveals the identity of his fellow criminals he will serve no jail time. Otherwise, a full penalty will be imposed. While a full analysis of this matter is quite complex, it is clear that one who informs out of fear of being punished himself anyway).is not generally deemed an informer; Choshen Mishpat 388:2. However, many authorities deem such conduct a sin; see Pitchai Choshen volume 5 Chapter 4, notes 31 and 32 and Chapter 12, paragraph 5 and 27. According to the view of Rabbi Waldenberg, such conduct is permitted as informing is not wrong in a just government. According to Rabbi Batzri, this conduct saves one's life, while endangering the life of others, and is wrong. According to Rabbi Wosner's approach, if this is an area where the authority of the secular law is valid in the eyes of Jewish law, such conduct is permitted. According to Rabbi Feinstein, such informing is prohibited and perhaps even makes the informer a pursuer.