In email, there are several ways to express the phrase "on behalf of" to indicate that you are writing or acting on someone else's behalf. Here are some common phrases and examples:

1. "On behalf of" followed by the person or organization you are representing:

   • Example: "I am writing this email on behalf of [company name]" [1].
   • Example: "This email is sent on behalf of [person's name], the CEO of [company name]" [3].

2. "On behalf of" followed by the management or organization:

   • Example: "My organization would like to thank you on behalf of the management" [1].
   • Example: "My organization would like to express our gratitude on behalf of [company name]" [3].

3. "On behalf of" followed by the person you are representing:

   • Example: "I am contacting you on behalf of [supervisor's name]. They would like me to inform you that we still need to hear back from you" [3].

Remember to use these phrases appropriately based on the formality and context of your email. It's also a good practice to consult with your boss or supervisor before sending any important emails on their behalf.

Learn more:

1. How do you say “on behalf of” in email? - Quora
2. formality - Signing off an email with 'on behalf of'? - English Language & Usage Stack Exchange
3. How to Send an Email on Behalf of Your Boss - English Recap