Which of the following documents would be recorded but considered void or invalid?

The answer is based on the understanding of how recorded documents function in real estate. A forged document is inherently invalid because it lacks the genuine consent of the parties involved. Forgery refers to the act of falsifying signatures or creating documents with the intent to deceive, which makes any attempt to record such a document null and void in legal terms. Even if a forged document is recorded in public records, it doesn't carry any legal weight or validity and can be challenged and removed.

In contrast, the other options present situations where the documents could still maintain some level of legal standing or be interpreted differently. For instance, an undelivered deed may be presumed valid under certain conditions, a correctly acknowledged deed usually indicates that the requisite formalities for execution were adhered to, and a deed witnessed appropriately supports its legitimacy. However, none of these circumstances apply to a forged document, as the act of forgery undermines the very foundation of legal documentation in real estate transactions.