What policy should be practised in commercial dealings?

 

Verses 282-283 of Chapter 2

O Believers, when you contract a debt for a fixed; term, you should put it in writing. Let a scribe write with equity the document for the parties. The scribe whom Allah has given the gift of literacy should not refuse to write. Let him write and let the one under obligation (the debtor) dictate, and he should fear Allah, his Lord, and should not diminish from or add anything to the terms which have been settled. But if the borrower be of low understanding or weak or unable to dictate (for any reason), then let the guardian of his interests dictate it with equity. And let two men from among you bear witness to all such documents. But if two men be not available, there should be one man and two women to bear witness so that if one of the women forgets (anything), the other may remind her. The witnesses should be from among such people whom you approve of as witnesses. When the witnesses are asked to testify, they should not refuse to do so. Do not neglect to reduce to writing your transaction for a specified term, whether it be big or small. Allah considers this more just for you, for it facilitates the establishment of evidence and lessens doubts and suspicions. Of course, there is no harm if you do not put in writing the common transactions you conclude daily on the spot, but in case of commercial transactions you should have witnesses. The scribe and the witnesses should not be harassed: if you do so, you shall be guilty of sin. You should guard against the wrath of Allah; He gives you the knowledge of the right way for Allah has the knowledge of everything. If you are on a journey and cannot find a scribe to write the document, then transact your business on the security of a pledge in hand. And, if any one transacts a piece of business with another merely on trust, then the one who is trusted should fulfil his trust and fear Allah, his Lord And never conceal evidence for he who conceals it, has a sinful heart: Allah knows everything that you do.

Verse 85 of Chapter 7:

And to (the people of) Madyan, (We sent) their brother Shu`ayb. He said: "O my people! Worship Allah! You have no other God but Him. Verily, a clear proof (sign) from your Lord has come unto you; so give full measure and full weight and wrong not men in their things, and do not do mischief on the earth after it has been set in order, that will be better for you, if you are believers.

Verse 35 of Chapter 17

And give full measure when you measure, and weigh with a balance that is straight. That is good (advantageous) and better in the end.