"We have adjusted our processes and procedures to take into account the new situation, which we continue to monitor, ensuring the continuity of business operations and client services," a spokesman for Germany's largest bank by assets said in an emailed statement.

Athens' partners have warned over the past week that a 'No' vote would mean cutting ties with Europe and driving Greece's crippled financial system into outright bankruptcy, dramatically worsening the country's 5-year-long depression.

(Reporting by Thomas Atkins; Writing by Carmel Crimmins; Editing by Kevin Liffey)