払い戻しに必要な書類はどのように入手できますか?
For purchases made using Flex: After your purchase, Flex will automatically email you the itemized receipt and/or Letter of Medical Necessity. If you don't see it, please check your spam folder for an email from notifications@withflex.com. If you still can't find it, please email support@withflex.com and let them know the email address associated with your order. For past purchases made...