One of the most essential issues for the implementation of the penal provisions of Islam, including the Hadd of adultery, is to prove it. Due to the problem of adultery in today's society and the existence of differences in the jurisprudential opinions of Islamic religion branches, the question arises as to how the Islamic religions agree or disagree in proving the extent of adultery? In this article, using the library review method, the researcher has stated the way to prove the extent of adultery between the five religions and then, he has applied to match its arguments. In Imami criminal jurisprudence, proof of the Hadd for adulterer is realized through four times confession of the guilty or the testimony of the witnesses and also among the Sunnis, all of them agree to prove the crime of adultery through the confession of the adulterer and adulteress,  as well as the testimony of the witnesses. Despite the differences between the religion branches, the Fatwas of the Imami and Sunni jurists do not differ in general, but in most cases there is a consensus.