Cajunlady's posted this here in the Banknotes section, so I assume she's talking about banknotes, not coins.
And unless they're scanned at really low resolution, banknote pics are too big to be uploaded to a CCF post; you'd need to use the CCF gallery or an off-site photo host.
Unfortunately, the best way to learn to identify foreign banknotes is "experience", and the best way to gain experience is to post lots of pics and ask lots of questions. But there are a few shortcuts that might be of assistance.
Learn to recognize distinctive features of each country's notes. The chrysanthemum of Imperial Japan, for example, appears on most pre-war and wartime Japanese notes (see
this recent thread for two examples), while similar-looking flowers can appear on notes of Japanese-occupied China. Other national symbols are usually present on notes, such as a coat of arms or a famous person or landmark.
Sort the notes into notes that appear to be all from one country, then post just one example for ID. Then use the ID given to search the entries for that country on a banknote website like
the banknotes.com gallery to try to find matches for the other similar notes you have. You then only have to post ones you're still having trouble with.
It also helps to learn to recognize the numerals used in different non-Western countries. Far eastern countries (Japan, China, Korea) often use
Chinese numerals. Southeast Asian countries (Thailand, Cambodia, Laos) use local variants of the
Khmer numerals. Middle Eastern and North African countries use
Arabic numerals. There's a handy table of the different forms of numerals in the index section of each volume of the world banknote and coin catalogues.
Finally, if there's Western-style text or text that's close enough in appearance to Western to be able to type it in, try typing it in, either in a post here on the forum or directly into Google. You'd probably discover that you're not the first person to ask, for example, where a banknote that says "TPANEZA THE HAAAAOE" is from. (That would be from
Greece, a close-as-you-can-get to typing "Trapeza tes Ellados", or "Bank of Greece").
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis