Four cryptocurrency exchanges in South Korea - Bithumb, Upbit, Coinone and Korbit - are reportedly facing stricter requirements for renewal of their accounts from banks in the country. Local news outlet The BChain reported the news on Monday, saying that the exchanges need to renew their accounts with banks, but due to recent guidelines from the inter-governmental body, the Financial Action Task Force (FATF), banks are demanding stricter measures against money laundering.