Know your customer (KYC) is the process of a business verifying the identity of its clients. The term is also used to refer to the bank regulation which governs these activities. Know your customer processes are also employed by companies of all sizes for the purpose of ensuring their proposed agents', consultants' or distributors' anti-bribery compliance. Banks, insurers and export credit agencies are increasingly demanding that customers provide detailed anti-corruption due diligence information, to verify their probity and integrity.

Know your customer policies are becoming much more important globally to prevent identity theft, financial fraud, money laundering and terrorist financing.