How to get HSA/FSA receipts and documentation from Flex
Last updated: February 18, 2026
If you need HSA/FSA receipts or documentation for reimbursement, Flex can only provide these documents if you used Flex as your payment method during checkout.
When Flex can provide documentation
Flex can provide receipts and letters of medical necessity only if you selected "Flex | Pay with HSA/FSA" as your payment method when completing your purchase. If you used this payment method, you should have automatically received:
An itemized receipt with the purchase amount
A letter of medical necessity (when applicable)
When Flex cannot provide documentation
If you did not select "Flex | Pay with HSA/FSA" as your payment method at checkout, Flex did not process your transaction and cannot provide any HSA/FSA documentation. In these cases, you'll need to contact the merchant directly for receipts or documentation.
Requesting documentation
If you used Flex as your payment method and need documentation, contact Flex Customer Support with:
Your order number
The email address used at checkout
The merchant/website where you made the purchase
The support team can reissue your itemized receipt and letter of medical necessity if needed.
Post-purchase subscriptions
If you signed up for a subscription after your initial purchase, Flex does not manage these subscriptions directly. The merchant processes these payments, so you'll need to contact them for receipts related to subscription charges.
Documentation requirements
Flex's itemized receipts include all the information typically required by HSA/FSA providers:
Patient name
Provider name
Services rendered or items purchased
Date of service
Amount of expense incurred