Courts did not begin to demand from the contractor an overpayment under the state contract

Mistakes of the customer in budget quotations at its calculation do not grant to it the right to return part of payment when works performed completely — it is attempt of unilateral change contracts. The contractor performed works on the municipal contract completely, qualitatively and in time. The customer accepted them and paid. The body financial controls decided that the customer paid works on overestimated ̆ costs and ordered to return the overpayment size to budget. Algorithm for the customer to cancel purchase if requirements changed and purchase is not necessary any more — in material from experts of System Lawyer: As to the customer to cancel...