The numbers of local postal items are composed of 14 characters (ex.: DS0123456789RR), starting with the mark "D" and ending by "RR", "CC", "AS" or "AR".
The numbers of the international postal items are composed of 13 characters (ex.: EE123456789MD), starting with the marks "C", "E", "H", ”M”, "R", "V" and ending by the mark "MD" or by the code of the origin country.