How to understand KYC, source of funds and compliance requests

KYC is a general term for the process a bank or financial institution uses to identify and understand its customer.

It usually includes identity verification, ownership information and questions about the intended use of the account.

Compliance checks are not limited to onboarding.

Banks may periodically refresh customer information or ask questions when account activity changes.

A long-standing customer can therefore receive a new KYC request years after opening the account.

The bank may ask for a passport, identity card, proof of address or other official identification.

It may also require certified copies or documents issued within a recent period.

A bank may ask for documents that explain the legal structure and current status of the business.

The legal shareholder is not always the ultimate beneficial owner.

Banks normally want to identify the natural persons who ultimately own or control the entity.

Ownership thresholds and control tests vary by jurisdiction and institution.

If several companies sit between the account holder and the ultimate owners, the bank may request a structure chart.

The chart should normally show each entity, ownership percentage and the natural persons at the top of the structure.

Source of funds usually relates to the origin of specific money entering an account or being used for a transaction.

Source of wealth is broader than source of funds.

A bank may ask how the customer built their overall financial position over time.

For example, through business ownership, employment, investments, inheritance or property.

If you state that funds came from a property sale, the bank may expect documents relating to that sale.

If funds came from business income, contracts, accounts or invoices may be relevant.

A large, unusual or cross-border transaction can trigger additional questions.

The bank may ask who the counterparty is, what the payment is for and why the amount or routing makes sense.

A vague description can lead to more questions.

The explanation should match the contract, invoice or other supporting evidence.

Use straightforward language that describes the actual commercial or personal purpose.

During onboarding or periodic review, the bank may ask about expected turnover and transaction patterns.

If the account starts receiving much larger payments, new currencies or transactions from different countries, the bank may ask for an explanation.

This does not necessarily mean wrongdoing is suspected.

Banks often ask where an individual or entity is tax resident.

Tax residency is determined under applicable tax rules and can differ from nationality or passport country.

Some customers can be tax resident in more than one jurisdiction.

Banks may request a TIN or equivalent number for tax-reporting purposes.

If a country does not issue a TIN in a particular situation, the form may provide another explanation option.

The Common Reporting Standard allows participating jurisdictions to exchange certain financial-account information.

Banks may therefore ask customers to certify their tax residence and provide tax identification numbers.

Financial institutions can ask whether an individual or entity has US tax connections.

Different forms may apply depending on whether the customer is an individual, company or other entity.

Entity customers can receive questions about whether they are financial institutions, active businesses or passive entities.

The classification can affect whether information about controlling persons must be reported.

If the classification is unclear, professional tax advice may be appropriate.

Banks may ask whether a customer, beneficial owner or close associate holds or has held a prominent public function.

A PEP classification does not automatically prevent banking, but it can lead to enhanced due diligence.

Banks check customers and transactions against applicable sanctions regimes.

Payments involving certain persons, entities, countries or sectors can require additional review or be restricted.

Banks may review public sources and ask for clarification about legal disputes, investigations or other information relevant to risk assessment.

Respond to the specific question and distinguish verified facts from inaccurate or outdated information.

A bank may ask you to reconfirm information that was already provided.

This can happen because records must be refreshed or because documents have expired.

Check whether the bank wants a new version rather than the old document again.

The letter should state when the information must be provided.

If more time is needed, contact the bank before the deadline rather than simply ignoring the request.

Depending on the circumstances, the bank may restrict transactions, delay payments or ultimately terminate the relationship if required information is not provided.

The exact consequences depend on the bank, agreement and applicable law.

A repeated request can mean that a document expired, the bank needs a more recent extract or some information was incomplete.

Refer to the earlier submission and ask what specifically is still missing if the request is unclear.

The business activity, ownership, expected account use and transaction explanation should not contradict each other without explanation.

If circumstances changed, explain what changed and when.

Compliance forms can have legal and tax consequences.

If you are unsure about tax residence, ownership, entity classification or another technical point, confirm it before signing.

KYC requests can involve passports, financial statements and personal ownership information.

Use the bank's official secure upload system or another approved channel where available.

Verify suspicious requests before sending sensitive information by email.

A complete compliance file can make future reviews much easier.

Legal, tax or compliance advice may be useful for complex ownership structures, multiple tax residencies, FATCA or CRS classifications, sanctions issues, substantial source-of-wealth reviews or disputed account restrictions.

Professional advice may also help when a bank request has consequences for an important business relationship.