You have shown insincerity... we are not going to readmit you to the Bahá'í community

"It was the approved practice for many years for Bahá'ís to leave blank the space for religion on official forms in Iran. This was not a denial of their religion, it was merely a tacit refusal to state it. In recent times, however, the authorities refused to accept forms made out in blank, and would deny passports and exit visas to anyone who entered Bahá'í' in the appropriate spaces. In order to get such documents a Bahá'í would either have to enter Muslim' (or one of the other recognized religions) on the forms or would have to employ an agent to do it for him. This thus became a conscious act by the Bahá'í to deny his faith, and the National Spiritual Assembly of Iran at that point warned all the believers that such an action was unacceptable."

"Those Bahá'ís who have left Iran by official routes since the governmental regulations changed have made a conscious choice. While the majority of their fellow-believers have preferred to face all manner of difficulties, rather than deny their faith, these people have chosen to make this denial rather than face whatever problems were before them. They have left Iran freely, with the permission of the authorities as Muslims. They have chosen freedom and comparative ease at the cost of giving away their faith, and have got what they wanted. Some, however, once they are free, want to have their membership in the Bahá'í community back again. The attitude of the Bahá'í institutions in refusing to immediately readmit them should not be regarded as a vindictive punishment. These institutions are simply saying: `You have shown the insincerity of your belief by denying it for your personal advantage, we are not going to readmit you to the Bahá'í community until we have some confidence that you are sincerely repentant of such an act. In the meantime you can abide by the choice you yourself have made.'

http://bahai-library.com/uhj_dissimulation_iran_emmigrants