Hi Petr,
I'm using too often abbreviations 
B1: Business One
BP: Business Partner
In the BP master data, the address fields are separated, so you can only fill each component.
In all documents (i.e. A/R invoice):
- You have two addresses: delivery and invoice named Address and Address2.
- Addresses are stored in two places: INV12 for all of the parts of the address AND the fields named previously.
If you modify by hand, on the logistic tab the content of the address, then the INV12 table is not filled.
In fields Address and Address2, fields are joined using the address Template for the country of the address and the line separator used is (by memory) the ASCII value 13 (0x0D).
My assumption on the begining was that you wanted to split the components of the address for a marketing document.
Regards,
Eric