An authorized seller refers to a site which has been approved by Sonic-FX™ to sell our products, such as Groupon.

If you have purchased your Sonic-FX™ from Amazon, the seller on Amazon must be Sonic-FX™.

If you have purchased a Sonic-FX™ Toothbrush from an unauthorized third party seller, please contact the seller directly to discuss your warranty as any particular seller who is not authorized by Sonic-FX™ may have their own warranty verification process.

For a current list of authorized sellers, please contact Sonic-FX™ at