View the list of Sample Business Letters Announcement of Change of Address for Billing Disclaimer: Be aware that some of these sample letters have legal, financial, or other implications. If you are not sure about the use of any letter, consult with an appropriate professional first. Announcement of Change of Address for Billing Gentlemen: Our new building is completed and we have moved into our brand new offices. Our new address and telephone number is as follows: (address) (city,state,zip) (telephone) Thank you for bringing this announcement to the attention of your accounting department.