An Affidavit of Understanding & Addendum to Purchase Agreement is a legal document that is typically used to supplement or amend an existing purchase agreement. It is created when parties to a purchase agreement wish to add additional information or modify their obligations or rights under the agreement. The Affidavit of Understanding & Addendum to Purchase Agreement must be signed by all parties involved in the agreement in order for it to be legally binding. There are two main types of Affidavit of Understanding & Addendum to Purchase Agreement documents: Standard Addendums and Custom Addendums. A Standard Addendum is a document that is used to add additional information to a purchase agreement that is not already covered in the original agreement. It can be used to add a specific clause or provision to the agreement, or to modify the terms of the agreement. A Custom Addendum is a document that is created to modify an existing purchase agreement to fit the specific needs of the parties involved. This type of document is often used to add additional clauses, modify certain provisions, or add new conditions to the purchase agreement. The Affidavit of Understanding & Addendum to Purchase Agreement must be signed by all parties involved in the agreement in order for it to be legally binding. It is important to have a complete understanding of the document before signing it. The document should also be reviewed by an experienced attorney to ensure that it meets the legal requirements of the agreement.