It is usually used in the third person's reply, without signature and text is short; for informal invitation, in the written reply, the first person is usually required to sign, and there must be a larger paragraph or a few paragraphs.

Include:

Thank you for your invitation.

Accept each other's invitation happily.

I am looking forward to being invited to the appointment.

Decline the invitation letter

The general requirement of this letter is to write succinctly and tactfully, without giving people the feeling of being rejected.

Generally speaking, it is written in third person or written by a secretary. There is no need to sign. The rejection of informal invitation is usually written by the first person and signed.

Its contents include:

First of all, I would like to thank each other for his kind invitation and regret for not being invited to keep the appointment.

And simply state the reasons for not being invited.

Finally, I believe that I will have the opportunity to meet in the future or extend my greetings to the inviter.