なくていい

(-)なくて(も)いい【(-)無くて(も)いい】

be unnecessary; be superfluous; be not required.

●申請は本人でなくてもいい. Anyone can apply on behalf of you. | The application need not be made in person.

・部屋は清潔でさえあれば広くなくてもいい. The room doesn't have to be big as long as it's clean.

・明日は来なくていいよ. You needn't [don't have to] come tomorrow.