people not to leave letters and packages unattended at the door or in a mailbox for long periods and recommends prompt pickup or alternate arrangements when you cannot be home https://www.uspis.gov/tips-prevention/mail-theft.
If there is an unexpected package, pay close attention to any note, return instruction, or QR code. The FBI has warned about unsolicited packages containing QR codes that can lead recipients toward websites asking for personal or financial information or toward downloads that compromise a device https://www.fbi.gov/investigate/cyber/alerts/2025/