Unpaid

The freelance writer had to send a reminder to the client for the unpaid invoices.

The charity relied on the help of unpaid volunteers.

The musician walked out of the recording studio due to unpaid royalties.

The company owes her several months' worth of unpaid wages.

The patient was surprised to receive an unpaid medical bill in the mail.

The company has a policy of not compensating its interns, so they work as unpaid employees.

The artist is willing to display their artwork for free, as long as they're not expected to work unpaid.