A joinder agreement is a legal document that allows additional parties to join a contract that has already been signed by a certain group. This can occur when a contract has been established between two or more parties but additional parties become involved, such as investors or business partners.

The purpose of a joinder agreement is to ensure that new parties are bound to the original terms of the contract and that they will comply with the obligations and responsibilities outlined in the original agreement. This can include provisions related to payment obligations, confidentiality agreements, and dispute resolution.

In most cases, a joinder agreement will need to be signed by both the original parties and the new parties joining the contract. This helps to ensure that all parties are aware of the terms and that they are legally bound to the agreement.

It is important to note that a joinder agreement does not invalidate the original contract or alter its terms in any way. Instead, it simply adds new parties to the existing agreement. This means that all parties will need to adhere to the same terms and conditions as outlined in the original contract.

Overall, a joinder agreement can be a valuable tool for businesses and individuals who want to expand their contractual relationships. By allowing new parties to join an existing contract, it can help to simplify the process and ensure that all parties are on the same page when it comes to their obligations and responsibilities. As with any legal agreement, it is important to seek the advice of a qualified attorney before signing a joinder agreement or any other legal document.