Dear …
The sad news of __(name’s)__ death has just reached me. I am shocked to hear of this tragedy and I could not be more sorry for your loss.
Over the years of doing business together, I came to know__(name)__ as a person with the highest of integrity and a person who sincerely cared. __(He/She)__ was a real pleasure to deal with. Please accept my most heartfelt condolences and sympathy for the loss of such an irreplaceable individual. I know your suffering is deep and painful and I share in your sorrow.
Such a fine person as __(name)__ , can only leave behind fond memories. __(He/She)__ will, without a doubt, be greatly missed by all.
Sincerely,