You are eligible if you purchased this product, even if you suffered no damage. Those with no damage are eligible only for the cost of the kit, up to $10. A larger settlement is available for those who suffered damage to their hair.

Some consumers who used Unilever’s Suave Professionals Keratin Infusion 30-Day Smoothing Kit experienced significant hair loss, damage, or burns to the scalp.

Supporting documents may be required for some cases. From the wording, I believe that in some cases this may only be a statement from the claimant that they have purchase the product.

"Unilever has agreed to create two funds: a "Reimbursement Fund" of $250,000, to reimburse consumers for their purchase of the Smoothing Kit, and an "Injury Fund" of $10,000,000, to compensate consumers for bodily injuries, for emotional distress that accompanied such bodily injuries, and for expenses incurred to treat those injuries. Class Members may be eligible to receive a payment from one or both funds."

FAQs: http://suave30daysmoothingkitlawsuit.com/info/faq#q1 Claim forms can be downloaded from this page.