With the creditors refusing either to negotiate or to make concessions until the results of the referendum were known, on June 30 Athens announced that it was delaying payment on money owed to the IMF. This was no mere administrative matter. The IMF is acknowledged as the super-senior creditor in international lending. Being in arrears to the IMF put Greece on a short list that included Sudan, Somalia, Zimbabwe, Afghanistan and Cambodia under the Khmer Rouge.67 And the size of its debts was unprecedented. Greece owed repayment on $26 billion to the IMF over the next ten years.