how to know 10 rupees coin real or fake
The fourth design of the ₹10 coin, minted since 2019, featured the Lion capital, the lettering “सत्यमेव जयते” in the center plug and the lettering “भारत” on left and “INDIA” on right on the outer ring. On the reverse side of the coin is the number 10 below the ₹ currency sign, the year of issue and eight stylized grain stalks. 
The second design featured two horizontal lines. The coin featured the lettering “भारत” and “INDIA” on the top, with Lion Capital in the middle and year of printing at bottom on the obverse. The reverse of the coin featured 15 notches and numeral 10 in the middle and at below line the word Rupees in English and रुपये in Hindi was written.  
2. While explaining the reason for minting a different set of coins, the Reserve Bank of India (RBI) said that since currency coins have longer life, the coins of different designs and shapes circulate in the market at the same time.
Between March 2009 and June 2017, a total of 14 kind of Rs 10 coins were minted across the eight-year period. One might ask as to why did the central bank release a litany of Rs 10 coins, a move that is likely to arouse doubts relating to genuineness of currency. To this, RBI rebuts says that unlike currency notes, the coins have a longer life and hence, coins that are released over a long period continue to stay in circulation simultaneously.
Rumors on fake 10 Rupee coins, started a few months ago. It is popularly believed that shopkeepers and some traders may have spread malicious rumors, that many 10 rupee coins were fake. A message was also circulated on WhatsApp, on how to find the difference between a fake and real 10 rupee coin. This was believed to be the handiwork of a neighboring country.
Visited a grocery store in Bengaluru, paid for groceries in 10 Rupee coins, only to be rudely turned away? The shopkeepers said, “I don’t accept 10 Rupee coins.” He shows you a bag full of 10 Rupee coins. No one takes them he says. You are not alone. Many shops, stores and eateries do not accept your 10 Rupee coins. They say…The Government has banned 10 rupee coins. Many shopkeepers say… “There are a lot of fake 10 rupees coins. How will I know the difference between the fake and real? ”
Look at the above image. I surprised how can a person who invest his money and mind to do the fake currency will commit such silly mistakes?
The Reserve Bank has advised members of the public not to give credence to such ill-informed notions and ignore them and continue to accept these coins as legal tender in all their transactions without any hesitation.”
Not only the Rs 10 coin faced rejection in circulation but also the newly minted Rs 1 coin is facing unauthorized demonetization in some parts of the country as well. For rupee ten coin, RBI previously issued notice for it being the valid currency and warned people about facing legal action for rejecting such coins.
While states like Uttar Pradesh have such immense number of coins in the circulation that every month or two, there surfaces a rumour which tends to cut them off the circulation, other states face a shortage of the coins. However, in recent times, the shortage in other areas has improved.