Prayer: Doubting the Performance of the Hired Person
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1519
If someone doubts whether or not the hired person has performed the act – even if the hired person says, ‘I have performed it’ but he is not confident in the statement being true – then based on obligatory precaution, he must hire someone again. However, if he doubts whether or not he performed the act correctly, he can assume it was performed correctly.