UPDATE 1-Cyprus Central Bank says enhancing 'know customer' requirements
* Tighter Cyprus rules follow Panama Papers leak
* Island is home to thousands of offshore firms (Adds context, detail; also changes story label to PANAMA-TAX/CYPRUS from EUROZONE-CYPRUS/CENBANK )
By Michele Kambas
ATHENS, April 7 (Reuters) - Cyprus is enhancing requirements on commercial banks and intermediaries to know the identity of their customers, days after a massive data leak detailing how the world's rich skipped through loopholes to park cash in low-tax jurisdictions.
Tighter regulations forcing banks and intermediaries to know their clients, as well as suspending account transactions for non-compliance, came into effect on Thursday, the Central Bank of Cyprus said in a statement.
The east Mediterranean island is home to thousands of offshore companies, many of them Russian.
Britain's Guardian newspaper reported on Sunday a network of secret offshore deals and loans helped people close to Russian President Vladimir Putin get rich, identifying some firms based in Cyprus. One bank named, Cyprus-based RCB, denied any wrongdoing.
The disclosures were part of a leak of documents from Panamanian law firm Mossack Fonseca on the financial arrangements of prominent figures worldwide, from Putin's circle of friends to relatives of British Prime Minister David Cameron.
Cypriot legislation allows the creation of companies with a "nominee" structure whose beneficiaries are not listed in company filings, but authorities say they impose a "know your customer" regulation on banks and intermediaries. Continuación...