Dear …
On behalf of __(Name of Organization)__, I want to thank you for the letter of reference you recently provided for our __(company/organization/firm/etc.)__. Your testimony to our service will inevitably prove to be very beneficial to us many times over in the future. Thank you for taking the time to write it.
At __(Name of Organization )__ we take pride in what we do and have worked hard over the years to raise our standards of service to the highest levels. On that note, I am pleased to announce that __(Name of Organization)__ is now __(type of)___ ISO compliant. It is important to us that our __(clients/customers)__ know that they can consistently expect superior service from us. And now, as an ISO compliant organization, we are formally committed to maintaining that standard.
Enclosed you’ll find our latest brochure for your review. If we can be of service to you in any of the areas listed, please don’t hesitate to call. We’d welcome another opportunity to talk about your requirements. It’s good to hear that you’ve been pleased with our service so far, __(Name)__, and again, we thank you for the letter of reference.
Sincerely,