See, e.g. , Aetna Ins. You have requested an opinion on survey plats, which constitute part of Iowa's statutory recording system administered by the counties. In doing so they add to the library's collection. This system only requires county officials to receive, copy, index, and return the documents in order to maintain the library and leaves the more demanding work of searching, analyzing, and reaching legal conclusions from those documents about title status to the general public. See 1 Am.
Acknowledgments seek to protect against the recording of false instruments.
Against this background, you ask whether a surveyor must acknowledge a plat survey and whether the property owner must sign it before its recording. Among other things, chapter 331 governs county officers. Chapter 354 defines various types of plats. Accord Iowa Code 355.1. Chapter 355 imposes certain duties upon surveyors.