I just need a result, and I want to pay for it, not for promises. but the "detectives" who promise nothing and work on a prepaid basis - more than enough. Here, right now, everyone will happily take an advance payment from me and begin to "work." As a result, I will lose time and money, .. I’ll also get some info about a person that the detective will not find out where to find the thread on a social network or in open sources. THANKS - but let such workers go through the forest. If a person is confident in his capabilities, then he will take up the task and make it, and the balabol will assure that everything is complicated, that prepayment is needed and there are no guarantees, etc. etc. I understand perfectly well that no one can give 100% guarantees, but why should I pay it is not known for what ?!
If a serious person with a reputation takes up this matter, then I am ready to discuss options with a reasonable prepayment and search for a debtor without returning the debt. But guarantees will be needed that this is the right person. you need to work in Estonia and maybe the ends will be in Latvia. There is no need to expect that they will kindly talk to you and tell you everything right away.
PS - when you put the car for repair - you also make an advance payment, and then take it faulty, if suddenly the master couldn’t do it? ... In any service sector they pay for the result, but how successful it will be depends only on the professionalism of the contractor