Verification (noun)

1. The act of proving or showing that something is true or valid.
2. The process of checking or testing something in order to establish its accuracy or authenticity.

Origin:

From the latin word verificare, to make true or confirm.

Examples:

1. The verification of the voter's identity is a crucial step in preventing fraud.
2. The scientist performed multiple verifications of the experimental results before publishing the study.
3. The bank required a verification of income before approving the loan application.
4. The software"s encryption can only be unlocked with a verification code sent to the user"s email.
5. The company's quality control process includes a verification step to ensure that all products meet the required standards.