Validation (noun)

1. The act of confirming the validity or worth of something.
2. The process of checking the accuracy or legitimacy of something.

Origin:

Late 16th century (in the sense "making valid"): from latin validatio(n-), from validare (see validate).

Examples:

1. The validation of the new software system was successful.
2. The validation of the research findings was conducted by a third party.
3. The validation of the results is necessary before publication.
4. The validation of the claim was based on solid evidence.
5. The validation of the documents is required for visa application.