The sentence 'your cooperation is greatly appreciated' is correct and usable in written English. You can use this phrase when you want to thank someone for their assistance. For example, you could write: "Thank you for your help. Your cooperation is greatly appreciated.".
Your cooperation is greatly appreciated.
Your patience is greatly appreciated.
Your help is greatly appreciated.
Know that your work is greatly appreciated!
DONATE Your support has never been more crucial and is greatly appreciated.
BBC One is greatly appreciated.
Prompt reply is greatly appreciated".
Awesome tool! I started using it one year ago and I never had to look for another app
Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia