Retainer agreements (also referred to as representation agreements) are a type of compensation agreement with lawyers either for reserving their employment or as compensation for future services. Also inside the agreement are details on the scope and procedure for the representation.
Wearing a retainer helps keep your teeth in the correct place, so they don't move. Think of it this way: Braces straighten your teeth, but your retainer keeps them that way. They help your teeth “retain” their position.
Retention Letter means a document held to maintain net economic interest significantly, updated by various parties from time to time.
As a best practice, licensees should consider using a retainer agreement or engagement letter for every matter. Confirming the essential terms of the engagement with the client in writing manages client expectations and reduces the risk of misunderstanding between the licensee and their client.
This is a legal contract between the law firm and the client setting forth the terms of the legal services to be provided and how the client will be charged for the services.