If one partner is Jewish while the other is not, a get is not required. The alternative path that lends legal force to your separation is ‘marriage annulment’, a process, which is sometimes possible even without one’s spouse’s consent. If, however, the Jewishness of one spouse is in question, the rabbinical court will prefer that a ‘get m’safek’ be given, preceded sometimes by a process of verification of Jewish status. In contrast to marriage, where any doubt regarding a person’s lineage renders Jewish marriage impossible, and definite proof of Jewishness is necessary, in divorce, if there is any possibility that both partners are Jewish, the Jewish process of divorce is required. Only definite unambiguous proof of non-Jewishness can release a couple from this obligation.