This article explains, in general terms, how green bond verification typically works in capital markets. It is educational in nature, does not constitute investment advice, and does not describe any specific company, security, or current event.
A bond can be marketed as “green” in every headline of its term sheet and still be refused entry to the Johannesburg Stock Exchange’s dedicated green bond segment. The word itself settles nothing. What actually decides whether a bond earns that designation, and keeps it, is a verification process that runs largely out of public view, well before any investor sees a prospectus. Tracing that process explains why two similarly worded debt instruments can end up on opposite sides of the same listing rule.
Building the framework before the papers are drafted
Before an issuer can even approach the JSE about a green listing, it typically has to produce a document called a green bond framework. This sets out which categories of projects the proceeds are allowed to fund, commonly things like renewable energy, energy efficiency, clean transport or water infrastructure, and it spells out how the money will be tracked once it is raised, how unallocated proceeds will be managed in the meantime, and what the issuer commits to reporting afterward.
Crucially, this framework is not written in isolation. It is built to align with an internationally recognized standard, most often the Green Bond Principles administered by the International Capital Market Association, or the Climate Bonds Standard maintained by the Climate Bonds Initiative. The JSE’s own listing requirements for its sustainability-labeled debt segment point issuers toward one of these recognized frameworks rather than allowing an issuer to define “green” on its own terms.
Bringing in an independent second opinion
Having a framework is not enough on its own. Before the bond is issued, the issuer typically engages an external reviewer that has no role in underwriting the deal to assess the framework against the chosen standard. This assessment is generally known as a second party opinion, and for bonds seeking formal certification under the Climate Bonds Standard, it is paired with a pre-issuance verification carried out by an approved verifier under that scheme.
This outside reviewer checks several things: whether the proposed use of proceeds genuinely falls within eligible categories rather than being described loosely enough to qualify, whether the issuer’s internal systems for tracking and reporting on the money are credible, and whether the reporting commitments meet the thresholds the standard requires. Only once that opinion, or in stricter cases a formal certification, is in hand does the JSE treat the bond as eligible for classification within its green or broader sustainability segment, as distinct from an ordinary listing on its main debt board.
Listing on the exchange, and what follows afterward
At that point, the bond proceeds through the JSE’s standard debt listing process, with the added condition that classification in the green segment requires publication of the framework itself and the external reviewer’s opinion alongside the usual issuance documents. This gives the market a paper trail linking the specific bond to the specific standard it was checked against, rather than relying on marketing language in isolation.
Verification does not end once the bond starts trading. Issuers are generally expected to publish periodic allocation reports showing where the raised funds were actually deployed, and in some cases impact reports describing the environmental outcomes attributable to those projects. Bonds carrying formal certification under a scheme like the Climate Bonds Standard may also require periodic re-verification to retain that status. If an issuer fails to meet these ongoing disclosure conditions, the bond’s green classification can be reviewed or withdrawn by the exchange or the certifying body, even though the underlying debt instrument continues to exist and trade under its original terms. That distinction, between a bond that simply exists and a bond that has been checked, documented and monitored against a named standard, is what the verification chain is ultimately designed to preserve.
