The first CM/1 applications distributed by IRO employees had a field for applicants to write their citizenship. However, it soon became clear that the question of citizenship was not so easy to answer. The revised CM/1 forms used from 1948 onward therefore distinguished between country of citizenship, country of last habitual residence prior to displacement, ethnic or national group, and whether the applicant had a Nansen passport (meaning they were stateless). In field 6(a), the applicants additionally had to mark whether they had claimed the citizenship, it had been officially established, it was a former citizenship or it was only presumed.