After ending Mut'ah marriage, a man and woman enter into permanent marriage by reciting the Nikah themselves and having 2 other women as witnesses to it. Is this permissible?
Bismihi ta'ala
In our Shi'ah fiqh, it is not obligatory nor a condition for there to be any witnesses during a marriage contract.
However, it is advisable and recommended for marriage to be conducted in the presence of others, and for the Nikah to be publicised and announced.
And Allah knows best.