October 1, 2017 Contact Name Address Address2 City, State/Province Zip/Postal Code OBJECT: REFUNDOFDUPLICATEPAYMENT Dear [CONTACT NAME], Enclosed is our check in the amount of [AMOUNT] which represents a refund for your inadvertent duplicate remittance ofpayment for [PURPOSE] We are pleased that [OUR or YOUR] bookkeeping department discovered this overpayment so quickly Sincerely, [YOUR NAME] [YOUR TITLE] [YOUR PHONE NUMBER] [YOUREMAIL@YOURCOMPANY.COM] [YOUR COMPANY NAME] [YOUR COMPLETE ADDRESS] Tel: [YOUR PHONE NUMBER] / Fax: [YOUR FAX NUMBER] [YOUR WEBSITE ADDRESS]