View the list of Sample Business Letters Acknowledgment of Correspondence Indicating Postal Delay 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. Acknowledgment of Correspondence Indicating Postal Delay Dear Thank you for your order. At this time we cannot fill your order due to an unexpected shipment delay from our overseas suppliers. We will hold your order for arrival of the merchandise, and ship shortly thereafter. Unfortunately, we cannot provide you with a specific shipping date at this time. Thank you for your anticipated patience in this matter.