The purpose of this Technical Specification is to define a facing identification mark (FIM), with procedures for its use, which can be used by any postal operator. It is primarily addressed to those postal operators that have not yet implemented the use of FIMs for automated facing and has been designed to minimise conflict with FIM marks that are already in use. Nevertheless, operators with existing FIMs are encouraged to consider support for migration to this Technical Specification as and when they uparade or replace facina equipment.