Correct, I as the petitioner provided a signed/notarized letter of intent to marry, but my fiancée as beneficiary did not provide her own letter(she had plenty of other evidence included, however, like pictures together, chat logs, etc). When I went to our US embassy here in Bahrain(we both live/work in Bahrain) to have my letter of intent to marry notarized, the consular officer informed that this letter was not required and it did not need to be notarized, but he notarized it per my request, which I submitted in my I-129f petition packet. I also did provide signed letters of attestation from both my friends/family & her friends that attested to the relationship & intent to marry. USCIS approved the petition.