One poorly-written endorsement states: “l have never seen a platform that pays really good like pro-options. thos is amazing.

“l thank every moderator here for helping me most especially to my account manager.”

Another states: “I'm so excited, I give gratitude to the entire staff of pro-options for I have received my profit of $4000...thank you all especially to my manager.”

An FCA spokesperson said: “We believe this firm has been providing financial services or products in the UK without our authorisation.

“Almost all firms and individuals offering, promoting or selling financial services or products in the UK have to be authorised by us.

“However, some firms act without our authorisation and some knowingly run investment scams. 

“This firm is not authorised by us and is targeting people in the UK. Based upon information we hold, we believe it is carrying on regulated activities which require authorisation.”

Pro-options has been contacted for a comment.