Most addendums we use in PA are already written as forms, so the answer is, it depends. Some brokers have their own addendums, as well. There are rare occurrences not covered (very rare) that need special wording and an agent shouldn't be playing lawyer with those. The agent shouldn't be making any changes without the buyers knowledge or consent (in writing) after a buyer signs. If you are using an attorney they should have full knowledge of changes, as well, and if they write the addendum it will most likely be on their letterhead. A buyer's agent should be in communication with their buyer and give copies of what is sent to a seller/listing agent, both before and after the seller has signed, IMO. - Sun Oct 4 2009, 15:57