Your Order Confirmation Email: What to Actually Save

Since this formula's own guarantee is calculated from your purchase date, your order confirmation email is worth keeping accessible from day one.

What to actually save

Your order number, the purchase date, the exact package and price you paid, and any correspondence with customer support — all worth keeping in one place, not just your inbox.

Why this matters most for the guarantee window specifically

Given that guarantee terms are described slightly differently across the brand's own pages — including whether the clock starts at purchase or delivery — having your purchase date clearly documented protects you if there's ever a question about timing later.