The finance ministry in a statement flatly rejected the report in the Kathimerini daily, which cited unnamed sources, as "baseless".
It also said that such articles dangerously undermined the country at a crucial moment in its negotiations with international creditors to secure desperately-needed funding.
"There are several similar recent articles that have been contradicted by the facts," the ministry said.
Observers, however, believe Greece would have to issue IOUs if it does not win more emergency euro funding from the European Central Bank to recapitalise its banks depleted by clients rushing to get their money out.
Deputy Finance Minister Dimitris Mardas yesterday reassured public servants that their wages due on July 13 would be paid without problem, thanks to what he said was good tax revenue.