When you need someone to confirm something in an email, you can use one of the following phrases:

  1. Could you please confirm...

  2. I would appreciate it if you could confirm...

  3. Can you let me know if...

  4. Please confirm...

  5. Kindly confirm...

For example, you could write:

"Dear [Name],

I wanted to follow up on our earlier discussion regarding [topic]. Could you please confirm that you received the revised proposal? I would appreciate it if you could let me know if everything looks good to you.

Thank you for your time and assistance.

Best regards,

[Your Name]"