This European Standard specifies complaints handling principles related to domestic and international postal services. It applies to both national and cross border services. Attention is given to how to handle complaints in multiple operator situations. The standard also gives guidance for compensation and redress procedures. This European Standard may be applied to all types of postal service both Universal service and non-universal service and by all types of postal organizations. It defines various types of complaints and establishes a methodology for handling complaints in order to improve the service given to postal users. It also gives guidance for co