A non-Muslim acquaintance has asked to borrow money. Initially, I said ok but now that I have thought about it, I have realised that it may not be such a great idea. He is indebted to other people and banks already but assures me he'll repay it. He has borrowed small sums before without repaying, I don't mind that but does it indicate a certain personality? Also, there is a possibility that I won't see him again (as our contact is minimal right now anyway and I'm going on a long holiday soon too). I know where he lives so can ask for the money back at any point, but I'm not very good at asking for money back, so I don't think I could do that. I know I won't be happy letting him off repaying the loan because its a large sum of money for me... although, I can afford to give it away as Ma'sha Allaah, I have a stable job. But couldn't I be helping a Muslim with that same money? I'm confused because I find it difficult to say no to people who are in need and he asked me very politely and offered to write a repayment note. What advice is there about lending to non-Muslims in need? Should I spend that money elsewhere instead? Is it terrible that I'm going back on what I first said was ok (I only agreed a few hours ago)?

All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger. We ask Allaah to exalt his mention as well as that of his family and all his companions.

If you are not sure about the honesty of this person or his ability to repay his debts then you have the right to go back on your promise. The majority of scholars are of the view that keeping a promise is something desirable and not obligatory. Moreover, this person, as you have stated in your question, has already borrowed money from you and other people and did not repay his debts. It might be also that you will never see him again, and so you will not be able to get your money back. Anyway, you can go back on your promise and you are not sinful, Allaah willing. Besides, a Muslim has priority as regards help and assistance over a non-Muslim. However, it is permissible in principle to lend money to a non-Muslim unless you know that he is going to use the money in forbidden ways in which case it is not permissible to lend money even to a Muslim.   

Allaah Knows best.