Three pieces of white paper were recently found amidst a pile of cash withdrawn from an ATM, Xinmin Evening News reported.

The woman who found the papers, surnamed Liu, told a reporter that it happened on March 18 when she withdrew 10,000 yuan from a Bank of Communications ATM in eastern China's Zhejiang province.

According to Liu, the size and thickness of the papers were the same as those of hundred yuan notes. Five black squares were printed on each paper, and at the bottom were the words "test note." Police confirmed that the paper came from Bank of Communications ATM.

The ATM maintenance company later claimed responsibility for the mishap. The company explained that the test notes are used for testing machines after regular maintenance, and they were probably left behind accidentally by a member of the maintenance staff.

The bank said they will exchange the papers for real cash as soon as the investigation is over.