“Spoofing” occurs when a caller deliberately falsifies the information transmitted to your caller ID display to disguise their identity. Spoofing is often used as part of an attempt to trick someone into giving away valuable personal information so it can be used in fraudulent activity or sold illegally. U.S. law and FCC rules prohibit most types of spoofing.

Caller ID lets consumers avoid unwanted phone calls by displaying caller names and phone numbers, but the caller ID feature is sometimes manipulated by spoofers who masquerade as representatives of banks, creditors, insurance companies, or even the government.​​​