Is it obligatory or an act of Sunnah

Q: Is it permissible for a person who is alone to perform Salah (prayer) without Iqamah (call to start the Prayer)? If doing so is not permissible, what is the ruling on the Salahs he performed while he was alone without saying the Iqamah? Should he perform them again?

(Part No. 6; Page No. 76)  A: The Iqamah should be announced before the Salah even if the person is alone. However, if you perform Salah without announcing the Iqamah, your Salah will be valid and you will not be required to perform it again.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.