### Question
What does authentication feature mean?


### Answer
**Authentication feature** has the following meaning in *18 U.S.C. § 1028*:

> any hologram, watermark, certification, symbol, code, image, sequence of numbers or letters, or other feature that either individually or in combination with another feature is used by the issuing authority on an identification document, document-making implement, or means of identification to determine if the document is counterfeit, altered, or otherwise falsified

#### Citation:
  - *18 U.S.C. § 1028*
  - Heading: **PART I-CRIMES > CHAPTER 47-FRAUD AND FALSE STATEMENTS**

