. . . I just feel that it is flat-out wrong to dive with an uncertified diver. Watered-down training notwithstanding, certification from some industry-accepted scuba agency is at least a minimum standard that every diver should attain. IMO it doesn't matter whether the person has been diving for 20+ years - uncertified is uncertified.
I completely agree with LeeAnn.
It is strange to hear of an uncertified diver today. Where did he get his tanks filled?