Dear (Recipient’s name),
On behalf of (Company’s Name) I would like to this opportunity to place on record our most honest and sincere thanks for choosing us to do business with us.
It will definitely be our great pleasure to do business with an organization of your repute in the future too and we are sure our association will go in a long way to benefit each other.
We hope we were successful in meeting up to your expectations. Looking forward to the great opportunities together.
Thanking you once again.