Here is a sample letter you can use to request a change in your payment method:
sample letter to change payment method
Dear [Name of creditor],
I am writing to request a change in my payment method for my account with your company. My current payment method is [description of current payment method], but I would like to change it to [description of desired payment method].
The reason for this request is [reason for requesting change]. I believe that using [description of desired payment method] as my payment method will be more convenient and efficient for me.
I have enclosed a voided check for my checking account, as well as a completed authorization form for automatic payments, for your records.
If you have any additional information that you need from me in order to process this change, please do not hesitate to let me know.
Thank you for considering my request. I look forward to your response.