data de abertura

15:15 Dec 5, 2017 

Yes, of course! I went with "date it was registered in the CNPJ" but added a note saying that the term is ambiguous and could refer to the date the company was founded or the date it officially opened for business.

14:52 Dec 5, 2017 

Could you share with us what translation you used for "data de abertura" in your specific context ? After all, this is a learning forum for all of us. Do us this favor.
I for one would like to learn and I would say all of our colleagues who gave their input in this question trying to help you would like to know as well.

22:03 Dec 3, 2017 

Interesting query. Should be asked separately. :)

20:56 Nov 30, 2017 

Thank you so much everyone!

20:50 Nov 30, 2017 

Indeed the foundation date can be called the "data de abertura", and is called that many times. It depends on the context, however. The correct use of "data de abertura" would be the date the company opened its doors commercially. But, considering this is a CNPJ "comprovante", the Department of Treasury actually doesn't know and doesn't give a shit when the company opened its doors. You are probably right, there. It's still an undue use of the expression, though ;).

19:42 Nov 30, 2017 

explanation on "Data da Situação Cadastral"

quite a good explanation!

19:37 Nov 30, 2017 

With all due respect, I disagree with you on these points:
3. Data de Abertura: The date when the company actually opens its doors and starts doing business officially. [ the company cannot open for business, without a CNPJ - they're applying for it at this point in the process]
2. Data de Constituição: The date when the acts of incorporation (bylaws) are signed/executed (this is the date of foundation). [ yes, I agree, this is when the company was established/founded/however you want to call it) in the EN article I submitted with my answer, they translated it literally as "Opening date", but I prefer to call it "founding date" which is the date the company was formed, by having the partners execute the Articles of Incorporation (BTW,not acts) or bylaws.
Please go thru this article again: http://thebrazilbusiness.com/article/cnpj-for-dummies

18:32 Nov 30, 2017 

Once the company has a CNPJ, it has to issue several mandatory statements regularly and pay taxes and fees to be considered cleared and regularized before the Ministério da Fazenda. The Date of "Situação Cadastral" is the date when the clearance was issued. It is valid for six months only. So if you receive a CNPJ with "regular" "situação cadastral" that is more than six months old, that document is useless. So this is yet another date, different than all those below.

18:30 Nov 30, 2017 

In Brazil, when you start a company, there are several important dates.
1. Data de Cadstro/Registro no MF: The date when the CNPJ is issued.
2. Data de Constituição: The date when the acts of incorporation (bylaws) are signed/executed (this is the date of foundation).
2. Data de Registro na Junta Comercial: When the bylaws are registered at the Board of Commerce.
3. Data de Abertura: The date when the company actually opens its doors and starts doing business officially.
Note these dates are entirely different from one another, as bureaucracy in Brazil is amazing.