Live ins fill out special forms with the DMAS appointed FA (fiscal agents) when they start working.  The FA's work under and for DMAS.  LIve ins have the same address on file with the FA as the consumer/participant/client.  They are often family and often have the same last names (participant and caregiver) on file with the FA.  These FA's work for DMAS.  All DMAS has to do is request the lists from the FA's that work under and for them.  The live-in lists are easily, and readily available.