Formal:
* Kudos to the team for their hard work and dedication to this project.
* The company received kudos for its commitment to environmental sustainability.
* The author deserves kudos for her insightful and engaging novel.
Informal:
* Kudos to you for finishing that marathon!
* Big kudos to my friend for getting that promotion.
* I give you kudos for your bravery in speaking up.
Remember: "Kudos" is always plural. You don't say "kudo."