In the Dar ul Islam Movement, the acceptance of Islam was formalized by declaring the following statements in front of at least 2 witnesses:
There is no god but Allah and Muhammad is His Messenger
Faith in Brief
I believe in Allah, as He is, with All of His Names and His Attributes and I accept His Commandments
Faith In Detail
I believe in Allah, His Angels, His Books, His Messengers, in the Last Day (of Judgement), in the pre-ordainment of good and evil and I believe in the resurrection after death.