Public Debt Office

Government securities are not administered by a company's registrar the way shares are — there is no R&T Agent for a G-Sec. Instead, one RBI office runs the whole lifecycle of every government security: the Public Debt Office (PDO).

Wherever the workbook needs an institutional anchor for a G-Sec — where a physical certificate is registered, where an SGL account sits, which office confirms a transfer — the answer is the PDO.

From Chapter 11, section 11.4: "All the activities relating to issue of government securities (G-Secs) — issue management, settlement of trade, distribution of interest and redemption — are handled by the Reserve Bank of India through its Public Debt Office (PDO)."

Physical G-Sec certificates are registered with one of the PDOs of RBI — most commonly PDO Mumbai. An SGL account's registration is identifiable from its number: an account registered with PDO Mumbai carries the prefix "BY." When a DP handles a certificate issued by a PDO outside Mumbai, it may accept it for dematerialisation only if the RBI Form of Transfer has been attested by the respective PDO.

Government securities themselves come in several types the PDO administers: Dated Securities (maturity more than one year) and Treasury Bills (maturity up to one year), alongside Sovereign Gold Bonds, Floating Rate Bonds and Inflation Indexed Bonds.

An investor holds a physical 13.85% Government Stock 2031 certificate, originally issued and registered with PDO Mumbai, identifiable by the "BY" prefix on its associated SGL registration.

To dematerialise it, she submits a DRF-GS and RBI's Form of Transfer to her DP, which endorses the certificate's reverse ("Tendered for Cancellation and credit to SGL A/c No. ___, Mumbai") and forwards it to the depository within seven working days. The depository submits the documents to RBI's PDO for credit into its Constituent SGL account.

Had her certificate instead been registered with a PDO outside Mumbai, her DP would only accept it for dematerialisation once the Form of Transfer carried that specific PDO's attestation — a step not needed for Mumbai-registered certificates going through the "BY"-prefixed route.

Chapter 11, section 11.4, names the PDO as the RBI office running the entire G-Sec lifecycle, and returns to it repeatedly through the dematerialisation, transfer and redemption procedures. Expect a question on what the PDO handles (issue management, settlement, interest, redemption) and on the "BY" prefix identifying PDO Mumbai registration.

• The PDO is an RBI office, not a depository or R&T Agent function — government securities have no company-appointed registrar.
• The "BY" prefix identifies registration with PDO Mumbai specifically — a different PDO's registration needs its own attestation on the Form of Transfer.
• Dated Securities have maturity of more than one year; Treasury Bills have maturity of up to one year — both are PDO-administered but are distinct instrument types.