Self-certification is when you sign a form yourself to say something is true, instead of getting an official person to say it for you.

Self-certification這個字 is when you sign a form yourself就是你自己簽表格 to say something is true來說某件事是真的，instead of getting an official person to say it for you而不是請官方的人來替你證明。

In Britain the everyday case is being off sick: for the first few days you can 'self-certify' — you fill in a short form for your employer saying you were ill, and you do not need a doctor's note. After about a week you do need the doctor. That is why the word turns up in offices, schools and HR emails there.

In Britain在英國，the everyday case最常見的情況 is being off sick就是請病假：for the first few days頭幾天 you can 'self-certify'你可以「self-certify」 — you fill in a short form你填一張簡短的表格 for your employer給你的雇主 saying you were ill說你生病了，and而且 you do not need a doctor's note不需要醫生證明。After about a week大約一週之後 you do need the doctor就需要看醫生了。That is why這就是為什麼 the word這個字 turns up in offices, schools and HR emails there會出現在那邊的辦公室、學校和人資的信裡。

The word is used more widely too, in the same shape: a builder can self-certify that work meets the rules, a company can self-certify that a product is safe. In every case the meaning is the same — the person doing the thing signs for it, and the system trusts them, with checks only if something goes wrong.

The word這個字 is used more widely too也用得更廣，in the same shape形式一樣：a builder建築工人 can self-certify that work meets the rules可以自行證明工程符合規定，a company公司 can self-certify that a product is safe可以自行證明產品是安全的。In every case每個情況 the meaning意思 is the same都一樣 — the person doing the thing做那件事的人 signs for it自己簽字負責，and而且 the system trusts them體制信任他們，with checks only if something goes wrong只有出問題時才會查核。

It is a formal, administrative word; nobody uses it at dinner. The related verb is 'self-certify' and the adjective form is 'self-certified'. It is mainly British; American workplaces usually talk about 'calling in sick' or a 'doctor's note' instead.

It它 is a formal, administrative word是個正式、行政上的字；nobody uses it at dinner沒有人吃飯時會這樣講。The related verb相關的動詞 is是 'self-certify'，and而 the adjective form形容詞形式 is是 'self-certified'。It它 is mainly British主要是英式用法；American workplaces美國的職場 usually talk about通常會說 'calling in sick' or a 'doctor's note'「calling in sick」或「doctor's note」 instead來代替。