A recent IR requested removal of the SN note on a set because the SN were unknown (the checklist by the company advertised those cards as SN40 or less).
However, while reviewing the site guidelines today I happened upon this:
Rule V: Use SN only for Serial Numbered cards, meaning cards where each one of that type received a unique identifying number. Normally, SN will be followed by the number of cards issued, generically described as SN##. Use SN by itself only if the number of cards issued is not known, as may happen with sets described by the issuer as “numbered to 50 or less” or numbered cards issued with a TBD or To Be Determined comment. Use a PR## Note to indicate the Print Run of cards produced in a stated quantity but not individually numbered. While SN can be used alone, never use PR without identifying the number of cards issued, e.g., PR500 or PR10, because PR alone provides no actual information about the card. If the number issued exceeds 999, do not use commas in the Note. Never use a number alone to represent SN or PR cards, e.g., 500, 75.
So my question is, is this still accurate and we can have checklist with notes that are just SN with no number if the number is unknown?