Add CausalePagemento according to https://www.agenziaentrate.gov.it/wps/wcm/connect/aea654b7-dfbc-4795-9d64-9ed0eb92b9a5/CU_istr_2018.pdf?MOD=AJPERES&CACHEID=aea654b7-dfbc-4795-9d64-9ed0eb92b9a5 page number 65-66
Add CausalePagemento according to https://www.agenziaentrate.gov.it/wps/wcm/connect/aea654b7-dfbc-4795-9d64-9ed0eb92b9a5/CU_istr_2018.pdf?MOD=AJPERES&CACHEID=aea654b7-dfbc-4795-9d64-9ed0eb92b9a5 page number 65-66

FatturaElettronicaPA/FatturaElettronicaPA