Additionally after searching more for the location of that quote, it appears on the USCIS website here at https://www.uscis.gov/sites/default/files/files/form/i-914instr.pdf, but that appears to be instructions for the I-914 and not the I-129F.
Sorry, but where did you find that quote? I was in a similar situation to the original poster, and tried to research it. On the official USCIS website for the I-129F instructions (https://www.uscis.gov/sites/default/files/files/form/i-129finstr.pdf) it says nothing like this. I can't find any confirmation anywhere officially that this is necessary. Just looking for a source for your reply, not questioning your knowledge.
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