A single payment policy applied worldwide either loses business or accepts risk badly. Gulf buyers with an established relationship commonly settle on a deposit and balance against documents. Markets with restrictive import regimes usually require documentary credit, which we work with and for which we send draft documents to your bank before shipment. Markets where the domestic banking system cannot support a credit settle by transfer in freely transferable funds.
We say which structure applies to your market at the first conversation rather than at production release. A supplier who agrees to terms they cannot clear is not being accommodating; they are deferring a problem to the point where your goods are finished and neither of us can move.
For first orders we generally ask for a deposit against material reservation, because the material is genuinely committed at that point. For established programmes the structure loosens, and we would rather earn that than advertise it.