LINCOLN, Neb. (CBS Local) — A man tried to use a fake $1 million bill to open a checking account at a local bank branch, police in Nebraska said.

The man presented the bill to a teller at a Pinnacle Bank branch in Lincoln’s Havelock neighborhood Monday morning, witnesses told investigators. He adamantly claimed it was real despite attempts by tellers to convince him otherwise.

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The man left the bank with the phony bill — and without a new account.

Staff at the bank branch reported the encounter because it was strange, Lincoln Police Officer Angela Sands said, the Lincoln Journal-Star reported.

Investigators are reviewing surveillance video in an attempt to identify the man. They want check his welfare and determine whether he had been the victim of a crime, Sands said.

The largest bill ever printed by the U.S. Mint was the $100,000 bill, according to the Treasury Department. The notes were used only for official transactions for a brief period in the mid-1930s between Federal Reserve Banks and were not circulated among the general public.

The largest bill ever printed for public circulation was the $10,000 bill.

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All banknotes above $500 were discontinued in 1969.