So I contacted Fox and here's what they sent me. Based on this, I don't think it's gonna be free for me (because it's probably been more than a year since a purchase or 18mo since a service) so it'll cost me $115 plus shipping and I just bought a brand new one for $110. Gonna double check my receipts and the LBS records but I think this is still going to be offered up as free here.
Fox service center guidelines:
o FOX will assess the MY2021-2023 Transfer seat post, once received at our service center, and determine if it qualifies for warranty support.
o If your MY2021-2023 Transfer post was purchased less than one year ago (based on original owner proof of purchase) or has been serviced within the past 18 months (proof of purchase and service receipt must be submitted), FOX will repair the product, and at their discretion determine what charges, if any, will be applied. If product qualifies for warranty support, return shipping will be provided at no-charge.
o If your MY2021-2023 Transfer post was purchased more than one year ago (based on original owner proof of purchase) and/or has not been serviced in the past 18 months, then you will be charged by FOX Factory to repair the post. Service will install the MY2024 Transfer service parts kit updates.
o The FOX Factory Service Transfer post charge will be $115.00.