Many of clients (entities which opened Inquiry's) start collaboration with experts without precise defined own requests. During day to day conversation, clients getting knowledge based on data and informations provided by experts through Zintro, emails and phone consultancy! At the end some of them avoid (or stall) to pay previously agreed and quoted price (within Zintro) for delivered and already used useful files finding excuses. So, suggesting to make obligatory advance payment by: first step: Customer/originator sets the form/shape (accurately defining own requests in the form); second step: experts are filling predefined form with the required data and validation; third step: opening posted file (experts data in predefined form by customer) require placing a lien by the customs in order to prevent the abuse and use of data taken without compensation! In cases of determining and proving abuse, Zintro desolate payment to data provider!