write-off would be the correct way i guess.
like this.
British
a vehicle or other object that is too badly damaged to be repaired.
“the passengers were unharmed, but my car was a total write-off”
a worthless or ineffectual person or thing.
“the magazine was a write-off, its credibility rating below zero”
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Finance
a cancellation from an account of a bad debt or worthless asset.
“their profits are weakening thanks to loan write-offs”