Wa`alaykum As-Salamu Warahmatullahi Wabarakatuh.
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Almighty Allah, and peace and blessings be upon His Messenger.
Dear questioner, we are really pleased to have your question and to have the chance to convey some of the teachings of our religion to our Muslim brothers. In fact, it adds to our happiness to find guidance being disseminated and the word of truth being highly elevated. We hope these humble efforts meet the great expectations of yours.
Misyar marriage can be defined as a marriage contract between a man and a woman, in which the woman waives some of the rights she would have in a normal Islamic marriage. This sometimes takes place when, for example, there are many women who, as they get older, find it increasingly difficult to marry. In this case a woman opts for a husband who is not able to fulfil the normal marital duties like financial maintenance, or spending adequate time with her, for example. She considers that marrying such a husband is better than remaining unmarried.
It’s noteworthy that once a marriage contract meets its Shari`ah requirements, it will be acceptable from the Islamic point of view irrespective of what people call such contract. Conditions of valid marriage are: The consent of both spouses, the consent of the wali(guardian), the payment of the dower, the presence of the witnesses, and the announcement of the contract.
It goes without saying that valid marriage should not be limited to a certain period of time; otherwise it will be reckoned as a mut`ah(temporal) marriage which is prohibited in Islam.
Dealing with this subject, the eminent Muslim scholar,Sheikh Yusuf Al-Qaradawi, states: