Her term as IMF chief does not expire until 2016, but amid the complexities of Europe's economic crisis this is a distraction she can ill afford, he adds.

BBC: IMF head Lagarde's flat searched in Bernard Tapie probe

The DVLA says that it sends letters to drivers whose licences are about to expire, but it is concerned that not everyone will check.

BBC: Driving licence fines threaten two million drivers

Put options (a contract to sell the stock at a future date) lock in a sell price, but increase costs, especially since they expire worthless if not executed.

FORBES: Lessons From The Flash Crash

Letting the tax cuts and the AMT patch expire for everyone would slash the deficit but is surely not the best thing to do.

FORBES: Extending Tax Cuts Would Create A Monster Deficit

Obama had already said he wanted to move forward rather than look back and signaled he would not repeal Bush tax cuts on the wealthy but rather let them expire in 2010.

CNN: Analysis: Obama can't expect rubber stamp from Democrats

But training does not always yield a job, and even extended unemployment benefits expire eventually.

ECONOMIST: Poverty looms for the long-term unemployed

Two more patents expire in 2015 and 2017, but analysts expected those would not have kept a Ranbaxy copy of Lipitor off the market.

FORBES: Pfizer Wins Longer Life For Lipitor

After those visas expire, the workers could apply for U.S. citizenship but would not be given preferential treatment over others, the Bush administration said.

CNN: Mexico's Fox backs Bush on immigration

Two franchises, Carolina and Cincinnati, even allowed their head coaches contracts to expire with John Fox not returning to Charlotte and Marvin Lewis still talking with the Bengals but completely free to field other offers.

FORBES: Coaching Carousel: A Cloudy Black Monday