Electronic Nota Fiscal or simply NF-e is the official document in Brazil in a form of “electronic tax invoice”. This kind of e-invoicing is used in logistics and services operations. This document is the basis for Brazilian legal operations and reports. SAP has the solution to create, validate and bookkeep it as well.
The Nota Fiscal is under States and Municipality rules, it can be electronic and can be on paper, which it is called DANFE (Auxiliary Document of the Electronic Invoice).
DANFE example

The DANFE, the paper version of the NF-e, is mandatory for goods movement, so it should be printed and carried along with the goods. Moving goods out of the branch gates without the DANFE can cause penalties for the company.