The Swiss Football League said in a statement on Wednesday that the decision was taken because the club was suspected of falsifying a bank document produced as a financial guarantee last year.
"The Swiss Football League (SFL) has taken away Neuchatel Xamax's license for participating in championships organised by the SFL," the statement said.
"The disciplinary commission has reached the conclusion that the conditions for the license are no longer met due to the non-presentation of financial guarantees.
"The disciplinary commission is also convinced that the banking guarantee from the Bank of America was not provided by the latter."
Neuchatel have already had eight points deducted for irregularities in the payment of social security contributions and players' wages.
He also sacked the entire administrative staff, leaving the club unable to print tickets for the opening game of the season, and parted company with all of the club's sponsors.
The club, whose website made no reference to Wednesday's decision but which carries earlier statements saying they feel they are being attacked from many quarters, have five days to appeal.
