Obligation of the National Treasury issued exclusively to settle debts with the National Social Security Institute - INSS.
Issued only in book-entry form at B3, it has post-fixed remuneration based on the TR variation. There are two ways to place the certificate. The first is through swap for any other Treasury obligation or for securitized credits on electronic auctions held at B3, which processes bids, discloses the results of the auction after prior manifestation of the STN, and carries out financial settlement. Institutions with individual accounts at B3 who are accredited for electronic auctions may participate. The second is directly with the INSS for the average price of the last CDP auction via swap for credit or securities received by the INSS.