【法】 成文习惯, 成文惯例

“没有一条成文法令比受民意支持的未成文的习惯更有约束力”（卡利·查普曼·卡特）。

bad debt written off【会计】;write-off bad debt【会计】;write-off uncollectible account【会计】

written confirmation

written approval【法】

written statement

written consent

bad debts written off

initial written proposal

written contract