CNMV is Spain securities market regulator and frequently publishes warnings on unauthorized platforms. For Spain-facing FX/CFD platforms, check CNMV register, warning lists, EU passporting, product scope, marketing compliance and local payment-agent risk.
If you have a dispute with a broker regulated by CNMV, here is the complaint path. Gather your evidence first (deposit/withdrawal records, trade history, support transcripts), then follow the process below.