The FAA has republished the Form 8120-11. This is the form for reporting suspected unapproved parts (SUPs).
The new version of the form was approved by the White House in 2016. One new feature is that the completion instructions are on the first page of the standard PDF - before the actual form. This means that people will typically see the instructions before they start to complete the form.
The 2009 version of the form put the instructions on the second page, between the primary form and the continuation sheet. It is natural for people to ASA has received many questions from members about how to complete the 8120-11 form, and many of those questions were answered in the instructions (found on the second page of the PDF). This is because it is natural for people to start at the top of page one and work their way through completing the form, without skipping ahead to examine the later parts of the form. Moving the instructions to page one will hopefully answer many of the questions that arise in completing the form.
If you encounter a Suspected Unapproved Parts, or SUP, then reporting is typically voluntary under the regulations; however many aviation companies have imposed mandatory SUPs reporting requirements on themselves through their quality manuals or operations manuals. Be sure to follow your own internal guidance when considering whether to report a SUP!