An example of identity theft is when an individual...

Using another person's information to open an account is a clear example of identity theft because it involves unlawfully accessing and using someone else's personal information, such as their name, Social Security number, or financial information, without their consent. This act allows the perpetrator to take advantage of the victim’s identity for financial gain, such as opening credit accounts, which can lead to significant financial harm and damage to the victim's credit score and reputation.

Creating a fake identity generally falls into the category of fraud, which may not necessarily involve stealing someone else's personal information. Stealing cash from an ATM pertains to theft but does not specifically relate to identity theft, as it typically involves taking physical currency rather than someone else's identity. Filing a fraudulent tax return can also involve identity theft if another person's information is used, but it can occur in situations not directly tied to identity theft, thus making it a less direct example. Overall, the act of using another person's information to open an account stands out as the most representative example of identity theft.