Hello. I have to implement the ticketing and shipping files of Caixa Econômica Federal. I started to read the documentation, but I was very confused as to what portfolios I can use. In the project Boleto.Net there is treatment for "SR", "RG" and "CS" portfolios but in the documentation of the available cashier In this link , the portfolios 11, 14 and 21 are mentioned.
As I have no experience in the subject, I ended up getting a bit confused. Could someone explain this a bit better or tell me where I can find the correct information?
I thank you for your help and apologize for missing any information!