A letter agreement between Pennsylvania counsel and a client for the provision of legal services using an alternative fee arrangement (AFA), outlining the parties' respective duties. This Standard Document can be used by outside counsel when drafting a retainer agreement or by in-house counsel when reviewing a draft retainer agreement. It is drafted from the perspective of a litigation engagement, but it also contains typical language that can be used in a transactional context. This Standard Document has integrated notes with important explanations and drafting tips.