I wrote to a colleague and wanted the respondent to reconfirm back a detail. My sentence goes.

Do confirm back if the sample used is from ___.

Does writing 'DO' sounds rude. Does it sound like I am instructing them to do something?

  • I can imagine this: Do confirm to me, if you would, whether the sample used etc. "confirm back" is not great. Just confirm is enough.
    – Lambie
    Commented Nov 8, 2021 at 16:17
  • I would not use do. I would just use confirm. That being said, you are not using confirm correctly. One confirms that. One does not confirm if. Check the definition in a dictionary.
    – EllieK
    Commented Nov 8, 2021 at 18:14
  • To my Canadian ears, "Confirm..." sounds possibly rude, like a direct order, which is rude if it's not to a subordinate or to someone you're very familiar with. "Do confirm..." sounds more polite, like a polite request, perhaps overly polite.
    – gotube
    Commented Nov 8, 2021 at 22:06

1 Answer 1


I think, in context, it does. A more polite version might be, “Please confirm ...,” or “Please do confirm ....” If it’s not really optional, some alternatives are, “Remember to confirm ...,” or “Be sure to confirm ....”

  • 1
    Note that do can also be used to emphasise a polite invitation - "Do sit down." "Do let me know if you have any questions." - but if your request to your colleague was just for something to help your own work, it's better to say "Please". Commented May 12, 2021 at 8:06

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