“Noted with thanks”是比較隨意的說法。一般來說，在商務場合，收到別人的信函或者通知後，出於禮貌應向對方表達已經收到對方來函這件事，而又沒有什麼特別需要回信的內容，就會回這句話。

但是這並不是特別禮貌的或者尊敬的說法，只是輕微的表示知道和感謝，最好不要用於回覆上級、客戶或地位比自己高的人。

同樣的情況下，更為尊敬的說法可以說成：Well noted with much appreciation/gratitude。

https://iknow-pic.cdn.bcebos.com/91529822720e0cf383d2a5140446f21fbe09aa3c

擴充套件資料

商用信函或者文書，開頭和結尾的寫法：

1、初次開場白：

It is my pleasure to write here for you.

回覆開場白：

Further to our conversation earlier, .........

As discussed over the phone, .......

Thanks for you kind reply.

Thank you for your inquiry/email.

Thanks for your letter. It is my pleasure to receive your reply!

Thanks for your mail of 日期......

2、結尾：

We will noted and many thanks!

I hope everything with you is fine.

Many thanks for your support.

I hope you are well and in good health!