No! - not the baptism of little green men from Mars! Seriously, at what point should we draw a line in the sand when it comes to accepting the baptisms of those baptised outside Baptist churches? Obviously no Baptist accepts infant baptism as a credible exercise of the ordinance, but what if the person had been immersed elsewhere the officiating minister had been unsaved or a woman, or the church was Arminian, or Oneness? What about trine baptism, or baptism face forward? At what point would you say a person ought to be rebaptised (or Scripturally baptised) and request them to resubmit to the ordinance?