can we deposit cash in any atm

No, you generally cannot deposit cash at *any* ATM. Cash deposits can only be made at specific machines known as Cash Deposit Machines (CDMs) or recycler machines, which are distinct from standard cash dispensing ATMs. While many banks install CDMs alongside their regular ATMs, you can usually only deposit cash into an account held with the bank that owns the machine. This is because the system needs to verify the account details and process the deposit within that specific bank's network.