Formal:
* Sulat ng Pagpapatunay sa Ugali: This is the most formal and direct translation. It literally means "Letter of Proof of Character."
* Sulat ng Rekomendasyon: This means "Letter of Recommendation," which can also be used for a character reference.
Informal:
* Sulat ng Pagpapatunay: This means "Letter of Confirmation" and is a more informal way of saying "character reference."
* Sulat ng Pagsang-ayon: This translates to "Letter of Agreement" and can be used for a character reference if the person is vouching for someone's character.
Other Options:
* Sanggunian sa Ugali: This means "Character Reference" directly.
* Pagpapatunay sa Ugaling Pantao: This translates to "Proof of Human Character."
The best translation will depend on the specific context and the level of formality required.