Who holds the balance, and can they prove it

Graduate · enrolled learners

This lesson opens with Synapse and Evolve Bank, 2024.

What happened

Synapse was a middleware company that connected consumer fintech apps to a partner bank, Evolve, so apps like savings and payment products could offer accounts without being banks themselves. The customers' dollars sat in pooled accounts at the bank, and the record of which individual end user owned what within those pools was a ledger, kept largely by Synapse. When Synapse failed and filed for bankruptcy in 2024, that ledger and the bank's records could not be reconciled: the sum of what end users were owed did not match the funds actually in the accounts, with a shortfall estimated in the tens of millions of dollars, on the order of 85 million, and around a quarter of a billion dollars in end-user deposits was frozen while no one could establish who was owed what. Ordinary people, whose paychecks and savings sat in these apps, were locked out of their own money, some for many months. No crypto was involved. The dollars were largely in the bank; what had failed was the ledger that said whose they were.

The decision point

A held balance, money a third party holds on your behalf, is only as safe as the ledger that records it is yours. When funds are pooled, many people's money sitting together in one account, the individual ownership does not exist in the bank's records at all; it exists only in a ledger the holder keeps, and that ledger becomes the sole proof of who owns what. Synapse is the case where that ledger could not be reconciled with the actual funds, so even though the dollars were largely present, no one could establish whose they were, and end users were locked out. The lesson is that the safety of a held balance is not the existence of the funds but the integrity and reconcilability of the ledger over them: a balance you can see in an app is a claim recorded on someone's ledger, and if that ledger cannot be reconciled with real money, the number you see is not proof of anything. So the decision when your money, or your customers' money, is held by a third party is to ask who keeps the ledger of individual ownership, whether it reconciles with the funds actually held, and how that reconciliation could be verified, because a held balance whose ledger cannot be proven is a Synapse waiting to happen.

Recorded loss

$85,000,000

Orientation and Year One are open: anyone can read them without an account. From Year Two onward the lessons are for enrolled learners, because progress through the later years only means anything if it is tracked against a record.

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