Quote from: HNajafi on Today at 10:12:15 AM

I need a real example of this concept something more clearer and more understandable

All the transactions are saved in the blockchain. If a transaction is confirmed, it means that it was correct and nothing fishy/counterfeit in it. The software checks that.
Your wallet will find out from the blockchain that you received money. If the transaction is confirmed, then you are good.

It also helps understanding that your wallet never receives money, the wallet only handles the keys for spending certain (your) coins from the blockchain.

So the software takes care of everything, makes sure all the conditions are met, so when you have received money, from the moment they're confirmed, they are yours and you can be sure they're not counterfeit or anything. Since Bitcoin is not physical, I'm not sure what are your expectations about this topic; the concept is different.

As I said, on the blockchain, everything is clear and enforced.
However, you still can get scammed:
1. Buy something something else, but that's advertised as Bitcoin. There are plenty of "Bitcoin whatever" altcoins, but they use different blockchains.
2. Various services may get your money and don't send you the coins.
3. Double spend (of the same funds) is something you can easily avoid it by waiting for at least 1-2 confirmations.
4. Some may try to give you Testnet bitcoins; those are only for testing and they're on a different blockchain.
5. Make sure that you and only you have the seed/private keys for the funds. Even if you made sure your coins are not counterfeit, they are easy to be lost/stolen from you.