Is My Ledger Device Genuine?

If you received your Ledger Nano device from any source other than authorized sellers, as listed by Ledger.com, you may check that your device is genuine by looking for the white on blue checkmark next to the name of your Ledger Nano device on Ledger Live.

Official list of resellers: https://www.ledger.com/reseller
and also in this article: https://support.ledger.com/hc/en-us/articles/4404389367057?docs=true