The failure to pay money you are supposed to pay — rent, tax, a bill, a fine, a loan instalment. It names the situation, not the act of refusing: whether you would not pay or simply could not pay, the word is the same. This is legal and official English.

you are supposed to pay你該繳的 money錢 the failure to pay沒有繳—— rent房租、 tax稅、 a bill帳單、 a fine罰款、 a loan instalment貸款的一期。 It它 names說的是 the situation這個狀況， not the act of refusing不是拒絕的那個動作： whether you would not pay不管你是不肯繳 or simply could not pay還是單純繳不出來， the word用的詞 is the same都一樣。 This這 is legal and official English是法律和公文的英文。

Its home is in the phrase "for non-payment of", which is how consequences get announced: evicted for non-payment of rent, cut off for non-payment of the electricity bill, taken to court for non-payment of tax. If a letter arrives using this word, something unpleasant is being set in motion, and the word is doing the job of stating a reason coldly and without argument.

Its home它的家 is in the phrase在片語 "for non-payment of" 裡， which is how consequences get announced後果就是這樣被宣布的： evicted for non-payment of rent 因未繳房租被趕出去、 cut off for non-payment of the electricity bill 因未繳電費被斷電、 taken to court for non-payment of tax 因未繳稅被告上法院。 If如果 a letter一封信 arrives寄來 using this word用了這個詞， something unpleasant某件不愉快的事 is being set in motion已經在啟動了， and the word這個詞 is doing the job of做的工作是 coldly冷冷地 and without argument、不留爭辯餘地地 stating a reason把一個理由講出來。

Because it is formal, it sounds odd in casual speech. You would not tell a friend "there was non-payment on my part last month" — you would say "I didn't pay". Save the noun for documents, notices, and reports.

Because因為 it它 is formal正式， in casual speech在隨口聊天裡 it sounds odd聽起來會怪。 You你 would not tell a friend不會跟朋友說 "there was non-payment on my part last month"上個月我方有未繳款情事—— you你 would say會說 "I didn't pay"我沒繳。 Save把 the noun這個名詞 for documents, notices, and reports留給文件、通知和報告。

It is uncountable and takes no article in the usual phrase: "for non-payment", not "for a non-payment". You will meet its cousins in the same letters — "late payment", "default", "arrears" — where arrears means the unpaid money itself, and non-payment means the fact of it not arriving. Written with or without the hyphen.

It它 is uncountable是不可數的， and而且 in the usual phrase在慣用的片語裡 takes no article不帶冠詞："for non-payment"， not不是 "for a non-payment"。 You你 in the same letters在同一批信裡 will meet會遇到 its cousins它的表親——"late payment"、"default"、"arrears"—— where其中 arrears means指的是 the unpaid money itself沒繳的那筆錢本身， and non-payment means指的是 of it not arriving錢沒有進來 the fact這個事實。 with or without the hyphen有沒有連字號 Written都有人寫。