A welldrafted buysell agreement can put business owners and their families at ease knowing there is a plan in place. We've created a detailed guide on effectively ending a business partnership.We've included our own experiences as well as our expert tips and tricks. A buyout agreement is a binding contract between business partners that establishes the buyout details of one partner exiting the partnership. Sell agreement is a contract made between shareholders that limits a shareholder's actions in the sale or transfer of shares if they leave the company. As a transactional lender, Celtic Bank can help you secure financing to buy out a partner without interfering with your existing business lender.