This letter confirms our telephone conversation on (date) detailing changes to my checking account. I would like to update my services from (service) to (service). I give my authorization to proceed with the changes.
Thank you for your prompt attention to this...
Dear (recipient's name),
This letter confirms our telephone conversation on (date) detailing changes to my checking account. I would like to update my services from (service) to (service). I give my authorization to proceed with the changes.
Thank you for your prompt attention to this matter.
Sincerely,
(your name)