What legal process involves amending a document by inserting text between existing lines?

The legal process that involves amending a document by inserting text between existing lines is known as interlineation. This technique is often used to clarify or add information without needing to rewrite the entire document. It typically preserves the original structure of the document while making the necessary changes in a way that is clear and identifiable.

Interlineation is particularly useful in legal contexts, as it maintains the integrity of the original text while allowing for adjustments to be made, making it easier for all parties to refer back to the original language and see what has been added. This method is advantageous in ensuring that changes are transparent and can be validated by all stakeholders involved in the legal process.

The other options represent different legal concepts or procedures that do not relate to the direct amendment or insertion of text into existing documents in this manner. For instance, joinder refers to the process of adding parties to a case, interlocutory pertains to temporary orders or rulings during court proceedings, and interrogatories are a form of written questioning used in the discovery phase of litigation. Each of these serves a distinct purpose in legal proceedings, separating them clearly from the concept of interlineation.