Rehypothecation is the further use of client assets by a financial intermediary—for example, when a lender passes on collateral received for a loan as security for its own borrowing. What matters to the client is who must return the assets, on what terms, and what happens if the next transaction goes wrong.
Anna wants a loan and gives a provider bitcoin as collateral. Under the agreed terms, the provider may use it further, perhaps to obtain its own funding. This is where Rehypothecation begins. For its analysis, the Financial Stability Board, or FSB, distinguishes the use of client assets from the broader reuse of collateral between counterparties. This is not a universal legal definition. For a service dealing with Bitcoin, the product name alone therefore tells Anna too little: the contract determines what is permitted. [1]
Anna needs to understand what handing over her assets actually changes. The FSB distinguishes a security interest—a creditor’s right over assets securing an obligation—from title transfer, which transfers ownership. Creating a pledge does not itself transfer ownership. A transfer, however, can change the nature of the return claim: the client may be entitled to equivalent assets under a contract rather than continuing to own the original assets. A BTC balance in an app does not reveal that difference; the documents and applicable law matter. [1]
Consent has a scope: which assets it covers, permitted uses, limits and when it can be withdrawn. Anna should also understand whether withdrawal ends existing transactions or merely prevents new ones. The FSB’s 2017 report describes approaches to client disclosure and consent at the time. It does not establish that every rule it describes remains valid today. In any event, signing an agreement does not guarantee that the assets will always be available. [1]
Consider our own simplified example based on an analysis by the Federal Reserve, the US central bank. Anna is client A, her provider is B and another lender is C. Anna supplies B with 1 BTC under an agreed right of reuse, and B passes it to C. There are now relationships between Anna and her provider and between the provider and the next lender. These do not mean 2 BTC on the blockchain, the record of bitcoin transactions. A claim is a demand for future performance, not another coin that has been created. [2]
The Federal Reserve explains how reuse helps finance further transactions while connecting their participants. By using assets from client A, provider B may obtain money from C on better terms. It may pass that benefit into the price of its service, but this is not automatic. Another dependency appears too: returning Anna’s assets on time may require unwinding the next transaction or finding funds elsewhere. Any return does not arise from simply holding BTC without further obligations; it comes from activity with costs and risks. [2]
Permission to use assets does not prove they have been used. A contractual ban alone does not prove compliance either. Useful records distinguish available assets from those tied up in further transactions and explain how they will return. Basel CRE22, part of the international banking framework for collateral, explicitly addresses monitoring reuse and possible liquidity shortfalls—having insufficient resources available when needed. For Anna, the practical question is whether the provider can meet a withdrawal even when another counterparty is not returning assets. [3]
If C fails to perform, B may struggle to return Anna’s assets. This does not automatically mean losing exactly 1 BTC: the provider may have other resources, and the eventual outcome depends on contracts and insolvency proceedings. Nor does a contractual claim alone justify a promise of prompt payment. The FSB describes obstacles to accessing client assets during insolvency, while Basel stresses enforceable rights. A delay, a dispute over claim priority and a final loss are different problems. [1] [3]
Before using the service, Anna also needs to understand the exit: who holds the assets, who is responsible for returning them and what must happen before a withdrawal. A clause banning Rehypothecation needs to be read alongside exceptions and rules for any further custodian entrusted with the assets. The clause alone does not eliminate fraud or custodian failure. FSB and Basel materials help explain the relationships; they do not certify a particular Bitcoin service as safe. What matters is the actual path from the client’s deposit back to their wallet. [1] [3]
For the clearest picture, read this entry together with Collateral, Prime brokerage, Counterparty risk, Self-custody. The reverse links also lead from Segregation, Prime brokerage, Collateral, Counterparty risk.