To use a spell trigger item, the user must first know what spell the item stores (unless he is activating the item blindly using Use Magic Device). Activating the item requires the user to have the spell stored in the item on his spell list and to speak a word. Even a character who can’t cast the spell stored in the item can use it from a spell trigger item as long as that spell is on his spell list. This is the case even for a member of a class that eventually grants spells but who can’t actually cast spells yet, such as a 3rd-level paladin. A domain spell is on a user’s spell list only if the user has access to that domain.