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Hello,
Thank you for reaching out to Ledger Support and I’d be happy to assist you with your request.
When you connect your Ledger device to Ledger Live, it will verify its authenticity. A tamepred Ledger device will not be able to connect to the Ledger Live app.
Indeed, your Ledger device is checked every time it accesses the Manager in Ledger Live or when it goes through the Genuine Check during the onboarding process. Genuine Ledger devices hold a secret key that is set during manufacture. Only a genuine Ledger device can use its key to provide the cryptographic proof required to connect with Ledger’s secure server.
If you have set up your Ledger device yourself (you set your own pin code and generated a recovery phrase that you have written down), downloaded Ledger Live from our official website, and connected successfully to Ledger Live, your Ledger device is safe to use.
You can find more information on how to check if your Ledger device is genuine in this article below: https://support.ledger.com/hc/en-us/articles/4404389367057-Is-my-Ledger-device-genuine-?support=true
For information on how to set up and secure your Ledger device please refer to our articles below:
1. Set up your Ledger Nano S: https://support.ledger.com/hc/en-us/articles/360000613793-Set-up-your-Ledger-Nano-S?docs=true
2. Securing your recovery phrase and PIN: https://support.ledger.com/hc/en-us/articles/360005514233-Secure-your-recovery-phrase-PIN-code?docs=true