View the list of Sample Business Letters Acknowledgement of Receipt of Estimate 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. Acknowledgement of Receipt of Estimate Dear This is to inform you that we have carefully reviewed your estimate on the parking lot refurbishing. We are planning to contract with you for this work. We are unable to let this contract immediately, as final approval of expenditures of this nature must come from the head office in New York. We expect to receive approval or disapproval within the next 30 days. At such time, we will contact you with instructions accordingly. If we may be of any assistance in the meantime please feel free to contact this office.