Fuda-ihai is an ihai inscribed (or engraved) with the posthumous Buddhist name(s) of one person or more such as husband and wife on the surface (the name of the person on ihai is inscribed in vermilion when he/she is still alive).
札位牌は、一人あるいは夫婦など二人以上の戒名等が表面に書かれた（彫られた）位牌である（書かれた人が存命中は、朱色の字にしておく。