Formal:
* "Congratulations on your remarkable achievement! Wishing you all the best in your future endeavors."
* "Warmest congratulations on your graduation. Your hard work and dedication have paid off. Best wishes for a bright future."
* "Congratulations on this significant milestone. We are so proud of your accomplishments."
Semi-Formal:
* "Congratulations on graduating! So proud of all you've accomplished. What are your plans for the future?"
* "Congratulations! All your hard work has led to this amazing moment. Wishing you success and happiness in the next chapter."
* "So thrilled for you on your graduation! You've worked so hard, and you deserve all the success coming your way."
Informal (for close friends or family):
* "You did it! So incredibly proud of you. Let's celebrate!"
* "Congratulations, grad! Onto bigger and better things! What's next?"
* "Woohoo! You officially made it! So proud and excited for you."
* "I'm so happy for you! Let's celebrate your amazing accomplishment!"
If you know their plans:
* "Congratulations on graduating! So excited for you to start your [job/grad school/travel plans]!"
* "Congratulations! Your hard work has paid off, and I can't wait to see what you do with your [degree] in [field]."
No matter what you write, consider adding a personal touch:
* A specific memory you have of them during college.
* A specific quality you admire.
* A wish for their future, tailored to their interests.
Remember to sign your name! And if you're giving a gift, you might mention it briefly, such as "Hope you enjoy the gift!"