Cash Register Integration

This chapter describes the cash register integration in accordance with Portuguese law. The general rules for cash register integration are described in the Chapter Cash Register Integration of the general part.

The errors the Portuguese Middleware returns, including what it validates and how to fix a rejected request, are described in Error Handling.

How the POS system behaves when the Middleware cannot be reached, and how documents issued on pre-printed forms during an outage are recovered, is described in Middleware Not Reachable.