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I want to close my informal letter with nice ending and I am unable to think over it

you can use don't be mean get seen or ciao or love

Students: We have free audio pronunciation exercises.
In school I was told that we could use dearie , love followed your nane

Kind Regards always works for me

Closing with Love, Hugs, Kisses is very personal and implies an intimate relationship. These would be acceptable to use with close family members, girl/boyfriend, wife/husband.