Solution : https://service.sap.com/sap/support/notes/151372 (SAP Service marketplace login required)
Key words : 
include &vitxt-txtko& object text id &vitxt-txtid&, point 'company code-dependent standard texts, headers footers signature text sender specifications, additional key words correspondence, respective company code headers, include &vitxt-txtko&, fields vitxt-txtko, dictionary structure vitxt, current company code, real estate management
Related Notes : 
       
| 199733 | Correspondence: letters are not printed | 
| 199003 | SAPscript correspondence: Customizing check |