Thank you for your fast response.
In general, all points related to automatic logistic processes looks like complex compared to other legislation processes around the world.
My last question about it, has Sao Paulo implemented the event ("Manifestação de usuário") as you mentioned in your response?
In the web site that you have recomended I could see the following information table about the web services:
NfeRecepcao
02:00
https://homologacao.nfe.fazenda.sp.gov.br/nfeweb/services/NfeRecepcao2.asmx
NfeRetRecepcao
02:00
https://homologacao.nfe.fazenda.sp.gov.br/nfeweb/services/NfeRetRecepcao2.asmx
RecepcaoEvento
02:00
https://homologacao.nfe.fazenda.sp.gov.br/eventosWEB/services/RecepcaoEvento.asmx
As I said, thank you very much.
Best Regards