Spoofing techniques involve tricking systems or individuals into believing that a false identity is legitimate. Common methods include email spoofing, where attackers send emails that appear to come from a trusted source, and IP spoofing, which involves sending data packets from a false IP address to disguise the sender's identity. Another prevalent technique is caller ID spoofing, where the caller's number is manipulated to show a different number on the recipient's phone. These tactics are often used in cyberattacks, fraud, and phishing schemes, making it essential for users to verify the authenticity of communications they receive.