What does these means?

Hello Guys...

What does the following mean:

• Updated trade register;

• IFU;

• Copy of valid identity document;

•Proof of residence ;

-Is my consular card and my international passport enough as a valid identity document?

-Proof of residence means Utility bill or Residential permit?

-What does • Updated trade register; and • IFU; means?

And another question please

• Is it a must i get a residential permit before i can register for a business?

Thanks