noun
letter of condolence; condolence message
A formal letter or message expressing sympathy after a death.
友人のご家族に悔やみ状を送りました。
I sent a letter of condolence to my friend's family.
A more general expression of condolence, often spoken or written in a less formal context than 悔やみ状, which specifically refers to a written letter.
Compound of 悔やみ (kuyami, 'condolence') + 状 (jō, 'letter').