These fundamental elements include information about the parties involved, the fundamental structure of the investment, the terms of payment, the subject matter of the contract, the date of the agreement and the signature of both parties. It also contains clear information on how much the investor will provide, the form of the investment and when the investments will have to be transferred. Writing an investment contract should not be concerned with what it seems, but with what the content of the agreement says. So make sure these details are included in your investment contract to ensure they are valid, informative and accurate. According to an article in Chron, the law requires private companies that intend to sell shares and shares a written business agreement. .