The article analyzes the specifics of requesting quotation and requesting proposal as a form of bidding. The author considers the current amendments to the Federal Law No. 223-FZ of July 18, 2011"On Procurement of Goods, Works, Services by Certain Legal Entities" and proves that the basis for the commented changes is the legislation of the Russian Federation on the contract system in the procurement sphere. The author studies the questions about the legitimacy of the refusal of the customers to conclude the contract with the winner of the request for quotation, the request for proposal. The necessity of a legislative solution of the problem of changing the material terms of the transaction concluded following the auction results at the stage of its execution is proved. Special attention is given to the new rules for concluding contracts, concluded on the basis of competitive procurement methods. Critical analysis is conducted on the classification of procurement for competitive and noncompetitive ways of determining the supplier provided for in the Federal Law No. 223-FZ. It is proposed to consider the changes into the Federal Law No. 223-FZ as a result of lobbying the interests of the largest corporate customers.