Formal:
* Avec amour de Tom: This is the most literal translation, but it might sound a bit stiff.
* Affectueusement, Tom: This means "Affectionately, Tom" and is a good option for a letter or card.
Informal:
* Avec amour de la part de Tom: This means "With love from Tom" and is a more casual and friendly option.
* Bisous de Tom: This means "Kisses from Tom" and is a very affectionate and playful way to sign off.
* Gros bisous de Tom: This means "Big kisses from Tom" and is even more affectionate than "Bisous de Tom".
Other options:
* Tendrement, Tom: This means "Tenderly, Tom" and is a romantic option.
* Amitiés de Tom: This means "Best wishes from Tom" and is a more neutral option.
The best option will depend on your relationship with the person you are writing to and the tone of your message.