The FBI has issued a warning regarding a scam targeting corporate executives, where letters from unidentified criminal actors are sent via USPS, claiming to be from a ransomware group. These letters, marked 'Time Sensitive Read Immediately,' aim to deceive recipients into paying a ransom. The FBI, in collaboration with the Cybersecurity and Infrastructure Security Agency (CISA), emphasized the importance of vigilance, especially as this scam is most active in April each year. The warning extends to businesses across the U.S. and parts of Canada, highlighting the ongoing threats posed by such scams, including unpaid toll and delivery service fraud.