10921 Changing name on telephone account

I understand that in order to change the telephone account to the new owner of a property you are required to fax the following docs to Telecom Italia:-
1. Letter of consent from previous owner
2. Letter of consent from current owner
3. Fiscal code of current owner
Does anyone know if I've missed anything and what the correct fax number is?

Thanks

Antinello

Category
Cost of living - Utility Services

If you manage to do it please let us know, 3 years later all we have managed is the previous owners name and a c/o to us!.Previous owner has left no trace of present address, not a surprise as still has not paid agents fees!.
A