Twelver Shia Muslims have five principles:
Tawhid (توحید): Allah is the only God in the world.
He is not born of anyone nor gave birth to any one, nor is any one like Him
Prophethood (نبوت): Muhammad (PBUH) is the last prophet of Allah.
Shia Muslims believe in all the Prophets that God has appointed to guide mankind.
Imamat (امامت): After the prophet, there are 12 Imams,
responsible for guidance and leadership of Muslims. They are appointed by Allah.
Fairness: Allah is Fair, he doesn’t oppress anyone
God does not punish people who have obeyed and worshipped him, and does not reward people who have disobeyed Him
Resurrection: All mankind will be resurrected on the Day of Judgment
To be judged for their actions and rewarded or punished, depending on each individual’s worldly conduct