In the form of a quotation application, the customer provided a field for the purchase participant's TIN. No application was rejected due to the lack of these data.
Nevertheless, the supervisory authority and the courts recognized such a requirement as a violation of Law No. 44-FZ. Asking the participant for quotations information and documents that are not provided for by Law No. 44-FZ is prohibited.
Taking into account the approach of FAS and courts, the customer should not be required from participants to include in the TIN application.
Document: Resolution of the Arbitration Court of the Far Eastern District of 07.06.2018 on the case N A59-4604 / 2017