Buying and Selling: Claiming Payment Before the Deferment Period in a Credit Transaction

Practical Laws of Islam as per the teachings of Ayatullah Sistani

Ruling 2116

If a commodity is sold on credit, the seller cannot claim payment for it from the buyer before the completion of the agreed deferment period. However, if the buyer dies and leaves behind an estate, the seller can claim payment from the heirs before the completion of the deferment period.

-Ayatullah Sistani, Practical Laws of Islam, Buying and Selling