When an item in a file or set of records has no date, indicate that in any images you make from the document–whether for your own personal use, posting to the web, sharing with colleagues, etc. Saying something is “undated” makes it clear to you later that there was no date on the item. Otherwise you may be wondering if there was a date and you simply forgot to include it. That’s a waste of time.
Learn more about research, methods, and sources in Casefile Clues.