Replying To [Haider1]:
It would be far better that you ask your customer for a Transferable LC.
That way (as an example), he opens the LC to you for (say) $10,000.
You then transfer the same LC to the Supplier for (say) $9,000.
When the goods are shipped, the Supplier's bank claims the $9,000 from your bank, and your bank claims the $10,000 from your customer's bank. Your bank collects $10,000, pays $9,000 to the Supplier's Bank, and puts your $1,000 into your account.
Easy as that.
Speak to your bank about this matter.