I didn't. I got that fax number late in the day and it went asap, but the next morning the portal said "received and being reviewed", so I skipped snail mail.
For what it's worth, here is the wording from the letter I sent to CRC right before all this movement with my claim finally started happening:
"Good day,
As there seems to be a delay on my claim, I thought I would provide some documentation regarding the vehicle’s history and exactly when it became “salvaged”, to clarify its legal inclusion and explicit eligibility in the settlement.
Neither party was injured in this incident, so a publicly available accident report was not taken. However, you will find the Deputy Report of Incident #xxxx attached, which catalogs the date of the incident (October XXth, 2015) and verifies the vehicle involved as being my vehicle (License Plate # xxxxxx at time of incident, presently xxxxxxx), the same vehicle represented in this settlement with VWGoA claim #xxxxxxxxx. This document was requested directly from Dxxxxx Police Department in Dxxxxxxx, CA, is a county certified document, and has been highlighted by myself with red and yellow boxes to ease location of critical information.
I have included an additional document entitled “AUXILIARY” which is an incident report involving the same vehicle (from a separate date and scenario that did not affect title status), that illustrates the vehicle’s License Plate (xxxxxxx) and corresponding VIN (3VWPL7AJ9Xxxxxxxx). This county certified document has also been adorned with red boxes, by myself, to ease location of critical information.
I am positive the Committee is very busy, but if there is any way I can receive a response of receipt of this email, in a timely manner, it would be greatly appreciated."
A week after sending this I received a "we're reviewing your email" email, and then the subsequent request for bill of sale and on to appt booking. Maybe this email and docs helped, maybe not.
Sorry for the long post.