QUICK ANSWER
Keep the order receipt, accepted terms, correspondence and shipping evidence together.
At purchase
Save the order number, payment date, product quantity and refund policy shown with the transaction. Record which business charged you.
Before returning
Ask the responsible support team for the applicable window, authorization requirements, address, container rules and postage conditions. Do not use instructions naming a different product without clarification.
After shipping
Keep proof of dispatch and tracking, plus any written refund confirmation. This site cannot determine eligibility or guarantee reimbursement.
Review the current purchase terms
Read the label, seller identity and full checkout terms before deciding. This link is an affiliate referral; its destination has not yet been verified end to end.
View purchase page