Sender: You are required to sign and return hereunder to signify your understanding of the content of Addendum No. 1.
Receiver 
: Please find a receipt of the addendum no. 1.
Is this what you want? What should the person do if he does not understand it?
I have received and I understand Addendum no. 1.
Signature . . . .
Date . . . . . . . .
Comments
Re-write: We have received the content of Addendum No. 1. Please find the duly signed letter for your attention.
Thank you
Re-write: We have received the content of Addendum No. 1. Please find the duly signed letter for your attention.
Please clarify the following points.
Do you no longer want people to say that they understand it?
I's better to say Addendum No. 1 instead of the content of Addendum No. 1.
Do you now want several people to sign now, instead of one person?
Dear Clive,
Correct, no longer to say "understand". Not several people to sign, just one. The tender addendum always comes to us by client in our workplace. The responsible manager need to acknowledge and return it by signature. Moreover, the client has sent us the pre-printed format as below:
Confirmed and Accepted By:
ABC Company
______________________________
Date: ________________________
I am responsible to reply an email to client after obtaining signature from manager.
Thank you
Dear Clive,
No, not now. Before I post the sentence to forum, I have done my work. Thank you.
I'm starting to feel a bit confused about all this.
Do you needany further help from us?
Clive