Can I use TrueBlue points or a JetBlue travel credit to pay for a seat selection?

What this answer depends on

• JetBlue stated seat-selection payment methods and pre-check-in points workflow, not credit refunds or account-balance management
• A seat fee is an ancillary purchase, whereas buying a fare that includes a seat product is a ticket purchase. JetBlue’s travel-credit limitation concerns the direct seat fee. The source mentions a fare-including-seat route, but that is not a promise that changing an existing ticket will be free or advisable. Review any exact offer separately.
• JetBlue directs TrueBlue-point seat purchases through the reservation before check-in. That makes the journey stage part of the payment decision. Retrieve the booking and inspect the eligible selection rather than waiting until a gate interaction and expecting the same payment controls to remain available.
• After a supported selection, inspect the recorded seat and payment confirmation for the intended traveler and segment. An account balance, an unsubmitted seat-map choice or a ticket credit is not itself a confirmed seat purchase. No points value or cash conversion rate is calculated in this article because the actual offer was not inspected.
• JetBlue permits eligible seat purchases using TrueBlue points through the reservation before check-in.
• JetBlue travel credits cannot directly pay seat-selection fees; buying a fare including the desired seat is a different stated route.