This series was recalled on 1 May 2000 and is no longer legal tender, but notes can still be exchanged for valid ones of the same face value at any National Bank branch or authorized agent, or mailed in by post to the National Bank in exchange for a bank account deposit. The exchange program will end on 30 April 2020, after which sixth-series notes will lose all value. As of 2016, 1.1 billion francs' worth of sixth-series notes had not yet been exchanged, even though they had not been legal tender for 16 years and only 4 more years remained to exchange them. To avoid having to expire such large amounts of money in 2020, the Federal Council (cabinet) and National Bank proposed in April 2017 to remove the time limit on exchanges for the sixth and future recalled series; this proposal is still in the draft bill stage as of early 2018.