Difference between Baisalam and Istisna

1. Payment:
(a) Bai-Salam: It is necessary that total payment is paid in advanced.
(b) Bai-Istisna: Total payment can be done upfront or at the end or by installment
2. Commodity:
(a) Bai-Salam: Agricultural products, fungible or generic goods. E.g. Paddy rice, wheat, corn
etc ( either manufacturing or not)

Bai Salam

Defination: Bai-Salam means advance sale and purchase. Bai means sale and purchase. Salam means advance.