Where can I find an up-to-date copy of your W-9? Sam Clark August 29, 2020 06:21 Updated The W-9 form is attached to your quote. You can also access it directly here: mysteryscience.com/w9. Related articles How do I submit a purchase order? How do I access my quote or create a new order? Which address should I use on my purchase order? Do you offer any discounts or other incentives? What membership should I buy if I'm not a typical classroom teacher? Comments 0 comments Article is closed for comments.