Banking Compliance and Sanctions: A Guide for HNW Clients in 2026

The compliance environment facing HNW banking clients has intensified dramatically since 2022. What was once a background administrative requirement — presenting identification documents when opening an account — has expanded into an ongoing, intrusive, and sometimes commercially disruptive process of source-of-funds verification, sanctions screening, and international information exchange. For internationally mobile HNW individuals, understanding what banks are looking for, why, and how to prepare for it is not merely useful — it is essential to maintaining functional banking relationships.

The UK Sanctions Landscape

The UK operates an independent sanctions regime following Brexit, administered by the Office of Financial Sanctions Implementation (OFSI), which sits within HM Treasury. OFSI maintains the UK sanctions list and enforces financial sanctions.

Current Major UK Sanctions Regimes (as of mid-2026)

Russia and Belarus: The most significant and expansive UK sanctions regime. The Russia (Sanctions) (EU Exit) Regulations 2019 (as amended repeatedly since February 2022) designate a large and growing number of Russian individuals and entities. Sanctions include:

• Asset freezes for designated persons.
• Restrictions on financial services to Russia.
• Restrictions on professional services (legal, accounting, management consulting) to Russian businesses.
• Import/export restrictions on a wide range of goods.

Iran: Comprehensive financial sanctions targeting the Islamic Republic of Iran, its financial institutions, and key individuals. Banks must screen all transactions against the Iran sanctions list.

North Korea: Comprehensive financial and trade sanctions.

Myanmar: Targeted financial sanctions against military-linked individuals and entities.

Venezuela and Cuba: Partial targeted sanctions.

Syria: Comprehensive asset-freeze regime.

What Sanctions Mean for Banking

If your name, the name of your company, or the names of beneficial owners of your company appear on any sanctions list, banks are legally prohibited from:

• Opening accounts.
• Processing payments to or from you.
• Making funds available.
• Providing financial services.

Banks are required to screen all clients against sanctions lists at account opening and on an ongoing basis (typically daily automated screening against updated lists). The screening applies not just to the client but to beneficial owners, directors, and — increasingly — to counterparties in transactions.

If an account is flagged by sanctions screening, the bank must freeze assets immediately and report to OFSI. This is not discretionary: it is a legal obligation with criminal liability for breach.

Politically Exposed Persons (PEPs)

A Politically Exposed Person is a current or former:

• Senior government or state official (minister, MP, senior civil servant, judge, military officer, senior official of state-owned enterprise).
• Close family member of the above (spouse, child, parent, sibling).
• Known close associate of the above.

Under the UK Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017, banks must apply Enhanced Due Diligence (EDD) to PEPs. This means:

• More extensive identity verification.
• Scrutiny of the source of the PEP's wealth — particularly wealth accumulated during public office.
• Higher management sign-off on account opening.
• Ongoing monitoring of transactions.
• Regular periodic review (typically annually rather than every three to five years).

PEP status persists: someone who was a minister ten years ago is still a former PEP and is subject to EDD, though the scrutiny reduces over time.

For HNW individuals who are PEPs — or who are family members of PEPs — banking relationships can be challenging to establish and maintain. Being a PEP does not mean a bank must refuse to provide services; it means they must apply additional scrutiny. However, some banks have adopted blanket policies of not accepting PEPs in certain risk categories (particularly from higher-risk jurisdictions) as a commercial risk management decision, which is permitted.

Source of Funds and Source of Wealth

These two terms are frequently confused but are distinct:

Source of funds refers to the specific origin of the money being deposited or transacted. Where did this specific £2 million come from? (Answer: sale of a property in Spain, proceeds of a business sale, inheritance from an estate.)

Source of wealth refers to the broader question of how the client accumulated their overall wealth. What is the origin of the client's net worth?

Banks increasingly require both — particularly at private banking level. The supporting documentation typically expected:

• For property sale proceeds: solicitor's completion statement and bank statement showing receipt.
• For business sale: share purchase agreement, sale proceeds statement.
• For inheritance: copy of grant of probate, estate accounts.
• For business ownership income: audited accounts, dividend vouchers, shareholder register.
• For investment returns: portfolio statements from the originating investment manager.
• For salary or bonus: employment contract, payslips, employer confirmation.

This documentation exercise can be time-consuming and is sometimes surprising to HNW clients who did not expect their bank to require such detailed justification of their own wealth. It is, however, a legal requirement under AML regulations, and banks face heavy penalties for failure to perform adequate EDD.

For Russian-origin wealth specifically: since February 2022, UK banks have applied heightened scrutiny to all accounts with Russian connections, regardless of sanctions status. Even unsanctioned Russian individuals with longstanding UK banking relationships have been asked to provide extensive source-of-wealth documentation and in some cases have had accounts closed if documentation was insufficient. This reflects banks' commercial risk appetite rather than a legal requirement to close accounts, but the effect is the same in practice.

Unexplained Wealth Orders (UWOs)

An Unexplained Wealth Order allows the National Crime Agency (NCA) or other designated agencies to require a person who holds UK property worth more than £50,000, and whose known lawful income is insufficient to explain the acquisition, to explain how they acquired the asset.

Failure to provide a satisfactory explanation does not in itself create criminal liability, but it can lead to a civil recovery order requiring the property to be forfeited. UWOs were introduced by the Criminal Finances Act 2017 and came into force in 2018. Their use accelerated significantly after 2022 in connection with Russian-linked UK property.

For HNW individuals with UK property assets, the practical implication is that maintaining a clear, documented record of asset acquisition — purchase contracts, mortgage documentation, funds flow documentation — is important not only for banking purposes but for any future UWO scrutiny.

CRS and FATCA: Automatic Information Exchange

The Common Reporting Standard (CRS), developed by the OECD, requires financial institutions in participating countries to automatically report financial account information (balances, income, proceeds) for non-resident account holders to their local tax authority, which then exchanges the information with the account holder's home country tax authority.

As of 2026, over 100 countries exchange information under CRS. A UK resident with a bank account in Switzerland, Singapore, or the UAE should assume that HMRC will receive information about that account. A UAE resident with a UK bank account should assume that the UAE tax authority (to the extent CRS applies there) will receive information.

FATCA (Foreign Account Tax Compliance Act) is the US equivalent: US persons (including US citizens resident anywhere in the world, and US residents) must have their financial accounts reported to the IRS by their foreign banks. US persons who fail to disclose foreign accounts face penalties under FATCA and the separately applicable FBAR (FinCEN 114) reporting requirement.

The practical consequence: do not maintain undisclosed accounts in any jurisdiction participating in CRS. HMRC and other tax authorities receive information routinely and can compare it against declared income and assets. Tax evasion through concealment of offshore accounts is now substantially harder than it was before CRS.

Practical Compliance for HNW Clients

Maintaining clear, well-organised financial records is the single most important practical step:

1. Keep a source-of-wealth file: a document setting out the key events that created your wealth (business sales, inheritance, property disposals, investment returns) with supporting documentation. This can be provided to banks on request and dramatically speeds up EDD processes.

2. Maintain a clear audit trail for all large asset transfers: every time a significant sum moves from one jurisdiction or account to another, retain the documentation explaining the source and the reason for the movement.

3. Respond to bank due diligence requests promptly: banks have legal obligations to conduct periodic reviews of existing client relationships. Failure to respond to information requests can result in accounts being restricted or closed.

4. Disclose relevant connections proactively: if you are a PEP, the spouse or close family member of a PEP, or if you have material connections to a sanctioned jurisdiction, disclose this proactively when opening new banking relationships rather than waiting for it to be discovered.

5. Review international accounts for CRS compliance: if you hold accounts in CRS-participating jurisdictions that have not been disclosed to HMRC (or your home tax authority), seek specialist tax advice on the appropriate corrective steps.

Note: sanctions rules, PEP definitions, and reporting obligations change frequently. The information in this guide reflects the position as of mid-2026. Seek specialist legal and compliance advice if you face account restrictions, sanctions screening issues, or source-of-funds investigations.

How Global Investments Can Help

For internationally mobile HNW individuals, compliance with UK banking regulations — particularly source-of-wealth documentation, PEP status management, and CRS obligations — is an ongoing requirement that intersects with wealth management, tax planning, and property investment.

Global Investments works with clients across multiple international markets and can connect you with specialist compliance advisers, wealth lawyers, and private banking specialists who have experience managing complex banking compliance situations. Contact us to discuss your requirements in confidence.