A tripartite agreement must be signed by these three parties – which makes the document worth its name – if a buyer opts for a home loan to buy a house in a project under construction. If A assumes responsibility and an agreement is reached for A to be held responsible for repaying this loan on behalf of C, this may be considered by Lender B. A tripartite agreement is a legal document that clearly defines the obligations and responsibilities of all parties to the transaction. . At the time of writing these documents, a borrower must ensure that the contract contains all relevant information regarding the loan and its repayment and placement for the original documents. .