Especially for the weak, aged or people limited disabilities. They are rung up asking the person have they heard about this brand new relief medication, could they send finances to etc, etc. These people ask their 'customers' if they have heard about these brand new 'cures' or relief for their ailments, they say that they represent this 'brand' new medical company, [so they can cover a wider field of their 'patients' ailments]. Then they either, if they have their bank details, they do not reply or send their medical medicines via the post. I did, and they sent me blue pills [colored chalk pills] they must have found my bank balance at that time was particularly low, but I changed my bank details soon after. Be careful it does happen!