RNVP (Restructuring, Normalization, Postal Validation) processing consists of a series of operations applied to a file to verify the validity of the addresses it contains and to standardize them. This procedure aims to reduce undelivered mail returns during postal deliveries or parcel shipments, while also enabling recipients to benefit from advantageous postal rates. Performed by specialized service providers, RNVP processing relies on address databases to make the necessary corrections automatically or manually, as appropriate. RNVP tools and services must be certified by the National Address Service through tests involving non-compliant addresses. A concrete example of postal standardization is presented below. For a detailed commercial overview of the economic advantages of RNVP processing, please refer to the provided image source.