Title: Banking Secrecy (multi-jurisdiction) · Jurisdiction · EthSystems

URL Source: https://original.es-internal.pages.dev/jurisdictions/int-banking-secrecy/

Markdown Content:
---
description: Banking-secrecy laws (strongest in places like Switzerland) protect client financial data from disclosure, but they are not absolute: they yield to AML/CTF, sanctions, tax cooperation (CRS/FATCA), court orders, and supervisory requests. For crypto builders the practical question is what client data you store, where, who can access it, and how cross-border disclosure works, a data-residency and minimisation concern as much as a confidentiality one. In practice, such data is confidential by default but disclosable by law.
title: Banking Secrecy (multi-jurisdiction) · Jurisdiction · EthSystems
image: https://original.es-internal.pages.dev/og.png
---

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#### Key regulations

* National banking-secrecy laws (e.g., CH Banking Act Art. 47)
* AML/CTF & sanctions regimes (EU AML, FATF, BSA/FinCEN)
* Cross-border tax cooperation (CRS / FATCA)

#### Entities

* banks
* custodians
* brokers
* CASPs
* asset managers

#### Activities

* onboarding
* data handling
* investigations
* cross-border ops

> Developer orientation. Not legal advice.

## What to Watch

* Conflict of laws: secrecy vs AML/sanctions disclosure obligations.
* Cross-border data transfer and residency constraints.
* Vendor/analytics tooling leaking client data across jurisdictions.

## See also

* [Jurisdiction: EU Data Protection & PETs](/jurisdictions/eu-data-protection/)
* [Selective Disclosure pattern](/patterns/pattern-regulatory-disclosure-keys-proofs/)

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