Home Glossary Redaction Redaction The A-Z of Privacy Redaction: An de-identification technique that deletes all or part of a value. Often, redaction will retain high level information, but remove detail, such as retaining only the first part of a postcode (SE1 8RT ⇝ SE1), or just the last four digits of a credit card number. (This is also referred to as clipping.) Return to glossary