"It has come to our attention that there has been an abuse of the GFH-Capital web domain and our Twitter account over the last few days, such that a third party has placed malicious and misleading content on them.
"We can confirm that there has been no compromise of our corporate computer systems. We have now established that the ex-Deputy CEO of GFH-Capital, David Haigh, retained administrative rights over these web accounts after his employment ended and we believe that Mr Haigh, through his associates, is responsible for these malicious attacks on our web presence.
"We are taking urgent action to recover these web accounts and will pursue legal action against those that have perpetrated and assisted in these malicious acts while spreading false accusations and misinformation."
GFH Capital also provided this 'background note':
"David Haigh was arrested in Dubai in May 2014, after the discovery of frauds carried out against GFH-Capital including the issuing of 100 false invoices that resulted in more than £4m of the Bank's money ending up in bank accounts belonging to him or a close associate.
"This has been certified by the relevant banks’ compliance officers. Courts in Dubai, the United Kingdom and Guernsey have also issued orders freezing his assets in those jurisdictions based upon the weight of the evidence against him.
"GFH-Capital remains confident that its claims of fraud against Mr Haigh will be proven in Court."
Haigh has always protested his innocence.