Q: Some people who receive Sadaqah (voluntary charity) may gather around the charity expected to be given from them and put their hands on it while one of them supplicates to Allah for the benevolent person and the others say, "Amen" in a loud voice. What is the ruling on this?
A: This way of supplication is Bid`ah (innovated matter in religion). However, supplicating to Allah for a charitable person without putting hands on the money that is given in charity or raising the voice with supplication as you mentioned is permissible. The Prophet (peace be upon him) said, "Requite him who does a favor to you. However, if you are unable to requite him, pray to Allah for him till you are sure that you have requited him adequately.'' (Related by Abu Dawud and AlNasa'y with an authentic Isnad (chain of transmitters)). Allah is the One Whose help is sought.