anyone knos a website shows the banknotes of countries which are exchangable and those are not thanks
Best thing to do is look at the central bank web site for the countries that you have a interest in most of them will show you the notes that are now in circulation.
Er ditto on that... hard to make a general statement about which notes are still legal tender as each individual country has different laws and policies regarding their banknotes. The US for example... almost every note the US Treasury and Federal Reserve (or other notes in some way issued by or under authority of the US Government) are still considered legal tender (are a small handful of exceptions). Australia has similar polices... even the banknotes of the Australian pound, not used since they switched to the dolllar in 1966, is still considered legal tender (1 Australian pound = 2 Australian dollars). Some countries however, when a new series is issued, the old ones are eventually cease to be valid (though they usually give a grace period to turn them in for new notes). Some countries periodically revalue their currency and old notes become essentially worthless due to the tiny nominal value once revaluation is figured in. Anyway best suggestion is to find the official site of the banking authority for whatever country (or countries) you're interested in; they usually give good detail about the current notes in circulation, old notes formerly circulated, and policies about what is and is not considered legal tender. Should be easy to find on any major search engine.