FASAH (fasah.sa) is Saudi Arabia's single-window customs platform operated under ZATCA. Importers register to get an importer number, and all customs declarations (bayan) are filed through it. Most companies authorize a licensed customs broker via electronic tafweed to file on their behalf.
Login uses Nafath identity verification. Declarations pass risk screening (green/yellow/red lanes), duties are paid electronically, and the port releases cargo.