Ledger, a hardware wallet provider for cryptocurrency users, has issued warnings about fraudulent physical letters being sent to its users. These letters falsely claim to be official correspondence from Ledger, urging recipients to scan a QR code and provide their 24-word private recovery phrase under the pretext of an "urgent security update." Ledger has confirmed these letters are scams designed to steal control of users' wallets. The company emphasized that it never sends physical mail regarding security updates. Additionally, a separate scam involving fake Google subpoenas is targeting crypto users by impersonating law enforcement and demanding wallet data through forged legal documents. Security experts have advised users to remain vigilant against such social engineering and phishing attempts.