B2G Federal: Centralized Platform Model
OZG-RE serves as the sole federal government portal for XRechnung submission. Leitweg-ID routing required in BT-10.
B2G State: Decentralized Exchange Model
State-level portals operate independently with Peppol as the common 4-corner network for interoperability. Peppol IDs use 0204: prefix + Leitweg-ID structure via KoSIT.
B2B: Post-Audit Model
No central platform or government intermediary. Direct peer-to-peer exchanges (email, EDI, third-party platforms) or optional Peppol network. Compliance verified post-issuance under GoBD standards.