i have set alert on list item "AssignedTo" (A task is assigned to Me). It was working fine since last 1.5 year. But now suddenly it fires twice. So all of the users assigned Task get alert twice. I dont know why it happens. how to resolve it?
Finally i found the solution. Users was getting alert twice because my one of colleagues has deployed event receiver that is used to set alert for users. So some of the users have alerts set twice for the same list. I removed unnecessary alerts and asked my colleague to modify his code.