Which document is utilized for correspondence between the Architect/Engineer (A/E) or owner and the contractor?

The use of a formal business letter is essential for correspondence between the Architect/Engineer (A/E) or owner and the contractor. This type of document serves as an official means of communication, providing clarity and formality in the exchange of important information. It helps establish a professional tone and ensures that messages are documented and can be referenced later, which is crucial in the construction industry where clear communication can prevent disputes and misunderstandings.

Formal business letters can cover various topics, such as project updates, requests for information, contract modifications, and other significant matters that require written documentation. This contrasts with other options like a proposal, which is typically an offer to undertake a project, and change orders, which specifically address changes to the original contract terms. Invoices are used for billing purposes and do not serve the same function for ongoing project discussions. Therefore, the formal business letter stands out as the appropriate choice for high-stakes correspondence between parties involved in a construction project.