I have seen it happen.

>Have you seen that happen? The note maker claims they're good to 120degC which is hotter than most dryers:
>
>http://www.noteprinting.com/banknotes_durability.Html
>
>I couldn't find anything with a GIS on "polymer currency shrunk" or similar - you'd think the first thing someone with a shrunken note would do would be to blog about it with a comparison with a normal one. Of course, these days someone could PhotoShop a normal note to a smaller size...
>
>If you baked polymer currency in a hot oven I imagine they'd shrink a bit.
>
>In the interest of science, maybe you could put a polymer note through the wash&dry and report the results ;-)
>
>(and hands off the PhotoShop)
>
>>Yeh they last longer, but don't put them thru the dryer, they shrink to abt 1/4 of their original size.
>>
>>>Hi Grady.
>>>
>>>>Bank notes are changing.
>>>
>>>Australia and other countries have had non-paper currency for a while. They last a lot longer so they're cheaper in the long run.
>>>
>>>Doug