Finding One Person

[shain]

can you tell me what is involved in finding one person who is known to have lived in Montreal Canada and last word Paris France 2007? if I hired a private investigator what should I ask for or look out for in terms of costs/expenses? also what if the issue is sensative enough that the person I would be looking for doesn't want any attention and contacting them would not be an option I ask for...just to know where they are and to know they are fine? in that way how do private investigators work...do they do as they are asked or will a p.i. do something like contact the person that is being sought on induvidual initiative to see if everything is OK with that person?