Praise be to Allah and peace and blessings be upon the Messenger of Allah, his family and Companions. Some institutions and shops publish advertisements in newspapers and elsewhere offering prizes to whomever buys their products. This entices people into buying specifically from their shops, or buying unnecessary goods, hoping to receive such prizes. Given that this is considered a form of prohibited gambling leading to misappropriating peoples' money and promoting one's goods to the exclusion of others, who do not offer these raffle drawings or gambling, I would like to advise people that this act is Haram (prohibited) and the prize is also Haram, for it is gained by way of prohibited gambling.
O you who believe! Eat not up your property among yourselves unjustly except it be a trade amongst you, by mutual consent. And do not kill yourselves (nor kill one another). Surely, Allâh is Most Merciful to you. And whoever commits that through aggression and injustice, We shall cast him into the Fire, and that is easy for Allâh.
This gambling is not considered a kind of trade permitted by mutual consent; rather, it is gambling prohibited by Allah, for it entails uncertainty, deception, and misappropriation of people's money, thus sowing enmity and animosity among people.
O you who believe! Intoxicants (all kinds of alcoholic drinks), and gambling, and Al-Ansâb, and Al-Azlâm (arrows for seeking luck or decision) are an abomination of Shaitan's (Satan) handiwork. So avoid (strictly all) that (abomination) in order that you may be successful. Shaitân (Satan) wants only to excite enmity and hatred between you with intoxicants (alcoholic drinks) and gambling, and hinder you from the remembrance of Allâh and from As-Salât (the prayer). So, will you not then abstain?
Allah is the One Whom we invoke to grant us, and the rest of Muslims, success and protect us from any action that contradicts Shari`ah. He is the Most Generous. May Allah's Peace and Blessings be upon our Prophet Muhammad, his family and Companions!