When Prime Minister Modi’s government suddenly announced the demonetisation of ₹500 and ₹1,000 notes on 8 November 2016, it created a huge scramble—especially for people holding large amounts of cash.

For ultra-wealthy industrialists like Mukesh Ambani (Reliance Group), the impact was quite different from that on small businesses or unbanked individuals, because:

1. Most wealth wasn’t in cash
   • Billionaires typically hold their wealth in assets (shares, companies, property, overseas investments), not in physical currency.
   • Ambani’s net worth was tied up in Reliance Industries stock and business operations, so demonetisation didn’t wipe out his wealth.
2. Well-established banking channels
   • Large corporate groups already operate mostly through bank transfers, cheques, and digital transactions, which were unaffected.
   • They had in-house finance teams to ensure compliance and manage liquidity.
3. Minimal “black money” risk
   • Big public companies are audited and regulated, so hoarding undeclared cash would be risky and unnecessary.
   • If any cash reserves existed, they could be deposited into bank accounts and justified as business funds, within legal limits.
4. Opportunity rather than loss
   • Demonetisation caused a spike in digital payment adoption, which benefited telecom and e-commerce sectors—areas where Ambani was expanding (e.g., Jio launched just before demonetisation).
   • The policy indirectly pushed more people towards digital services, boosting his market reach.

In short, wealthy business families like the Ambanis weren’t queuing at ATMs; they simply didn’t hold large amounts of illicit cash in rupee notes, and in some ways, the policy even worked in their favour.

Exactly — after Modi’s 8 November 2016 announcement, the ₹500 and ₹1,000 notes stopped being legal tender immediately for normal transactions.

That meant:

• Shops, markets, petrol pumps, etc. couldn’t legally accept them (except for a few temporary exemptions like government hospitals, railway tickets, and tolls for a limited time).
• The only way to keep their value was to deposit them in a bank or exchange them at designated RBI/Bank counters within the allowed window.
• After the exchange window closed (December 30, 2016 for most people), any unexchanged notes essentially became worthless paper — unless you could prove to the RBI later that you were abroad or had special permission, which was rare.

So, for someone holding a stash of ₹500/₹1,000 notes:

• If they acted quickly → deposit/exchange → money stayed valid (though large deposits could trigger tax scrutiny).
• If they waited too long → no shop or individual could legally take them → value gone.

This is why daily wage earners, small shopkeepers, and people in remote areas got hit hardest — even if their cash was perfectly legal, the logistics of exchanging it in time were brutal.