The right of set-off is exercised by notice to the other party.

行使抵销权时，应该通知另一方当事人。

youdao

The new obligor may not exercise against the obligee any right of set-off available to the original obligor against the obligee.

新债务人不能够向债权人主张原债务人可以向债权人主张的抵销权。

youdao

We must get the right kind of frame to set off the picture.

我们得找个合适的镜框把这幅画衬得更加好看。

《新英汉大辞典》

But in April 2009 the U.S. told Tronox that the DOE had frozen those funds pending discussions about the right of the U.S. to set off the Title X reimbursement against its pre-petition claims in the Tronox bankruptcy.

FORBES: Bankruptcy Judge Scolds Latham Attorney Over Disclosure Of Fee