The Ruling on Investing a Deposit Without the Owner’s Permission
Machine translationRead the Arabic original
Question:
The questioner, who used the pseudonym Abdullah Alif Alif, says: I deposited a sum of money with my friend. I benefited from it and invested it for my own benefit. When he came to me, I returned the full amount of the money, and nothing was deducted from it. I gave him the amount he had deposited with me, and I kept the investment. Is this permissible?
Answer:
If he gave you permission to invest it, then it is permissible. But if he did not give you permission, and he deposited the money with you without allowing you to invest it, then you have made a mistake. You have erred in this, because a trust is not to be invested in, nor is the depositor to dispose of it as he pleases. You have erred in this. Perhaps the profit from this money belongs to him, because he did not give you permission for it, except for what he gave you from it.
The questioner, who used the pseudonym Abdullah Alif Alif, says: I deposited a sum of money with my friend. I benefited from it and invested it for my own benefit. When he came to me, I returned the full amount of the money, and nothing was deducted from it. I gave him the amount he had deposited with me, and I kept the investment. Is this permissible?
Answer:
If he gave you permission to invest it, then it is permissible. But if he did not give you permission, and he deposited the money with you without allowing you to invest it, then you have made a mistake. You have erred in this, because a trust is not to be invested in, nor is the depositor to dispose of it as he pleases. You have erred in this. Perhaps the profit from this money belongs to him, because he did not give you permission for it, except for what he gave you from it.
Source
نور على الدرب - الفوزان - 03/242 — archive.org (18:01)
The Arabic text is a machine transcription of the audio recording.