Legit (adjective)

1. Genuine, authentic, or valid.
2. Conforming to the rules or standards.

Origin:

1940s, american english, shortened from legitimate.

Examples:

1. The concert ticket was legit and allowed her entry to the event.
2. The website offered legit and safe online shopping.
3. He was a legit businessman and not a criminal.
4. The company had a legit concern about the new policy.
5. The complaint was legit and the company had to make changes.