Harvard's Ig Noble prize in economics goes to a study by a Dutch scientist who, after seeing filthy-looking bank notes in circulation around the world, created an experiment to gauge which world currency is, on average, the most hospitable to bacteria.

The Bank of Albania's new bank note series, with the same subjects as the previous series in a refreshed perspective, begins entering circulation September 30 with the 200-lek note, the nation's first in polymer.

Gold nuggets weighing up to nearly 40 troy ounces are the featured highlights in Holabird Western Americana Collections LLC’s online and live 3,000-lot-plus auction from Reno, Nevada, Oct. 4 through 7.

The final note in Switzerland's ninth bank note series, released Sept. 12, 2019, highlights the role of water in Swiss humanitarian aid.

Record numbers of counterfeit 500-peso notes are among the counterfeit notes removed from circulation in Mexico in the first half of 2019.

Paper Money Guaranty now certifies much more than traditional paper money. Most bond and stock certificates are proclaimed eligible for PMG authentication, grading and encapsulation.

Hoping to circulate unused inventory, the Federal Reserve decreased the number of notes it ordered from the BEP for Fiscal Year 2020.

Mexico's new 200-peso bank notes replace the depiction of Sister Juana Inés de la Cruz with Miguel Hidalog y Costilla and Jose Morelos y Pavon.

A 50-cent scrip note from a railroad that served the Confederate Army, intergenerational treasure boxes and a group of linked circulating counterfeit Morgan dollar are the themes of some of the columns in the newest issue of "Coin World."

A new £20 note issued in Northern Ireland celebrates the concept of "craic."

An English direct short term and payday lender going by the name of Moneyboat, for unexplained reasons decided to investigate whether polymer or paper currency was better for the environment.

The latest BEP production report, the first published in months, reveals that the BEP has begun printing Series 2017A notes, the suffix “A” representing a minor change in the production process.

The last issue of the £1,000 Bank of England bank note, dated Nov. 20, 1936, will be the centerpiece of Dix Noonan Webb’s 631-lot auction of British and Irish currency Sept. 12 in London.

Very few countries have notes without portraits, but Gambia has become the second country in Africa to drop them from its notes after the president formerly depicted was voted out of officer and exiled.

Paper money from two countries, India and the Philippines, took the top spots at the Stack’s Bowers Galleries auction of world paper money on Aug. 14 in Rosemont, Illinois.

New Kenyan notes are strikingly different from their predecessors because the law prohibits notes and coins from bearing the portrait of any individual. However, an activist has sued the bank for violating the law.

An extraordinary group of encased postage stamps, the personal reference collection assembled by Q. David Bowers, was auctioned by Stack’s Bowers Galleries on Aug. 13 in the first of the firm’s ANA convention auction sessions.

A pair of parody notes take aim at Brexit and new United Kingdom leaders Jacob Rees-Mogg and Boris Johnson, the latter the prime minister.

A note previously unknown, even to specialists, a British India 1,000-rupee issue from Jan. 27, 1925, was certified and graded Very Fine 25 by Paper Money Guaranty.

The 325th anniversary of the Bank of England’s founding in 1694 is the subject of a new exhibit just opened in the bank’s museum.