What documents should I have if I want to open an account in this platform?

http://raceoption.com

Raceoption is not a licensed or regulated broker even though it states offers that look good to be true. Raceoption claims to be operated by Makerun Corp, which is registered in the Marshall Islands Registry (IRI). However, IRI does neither issue any licenses for forex trading or brokerage nor regulate, monitor, supervise or license international companies engaging in such activities

Besides, we did not find any results matching Makerun Corp in IRI. 

What's more, two professional regulatory bodies issued warnings against Raceoption for being unauthorized to provide financial services. You can check full warnings from the Spain CNMV and the Portuguese CMVM.

The truth is, Raceoption is not overseen by any regulators. That means your personal data or your funds in this broker are unsafe and cannot be protected by any law. We would recommend traders stay away from unregulated brokers like Raceoption and trade with licensed brokers.