An item from Poshmark fits poorly and I need a quick exchange. What steps secure the fastest replacement or refund?

Contact the seller proposing a prompt exchange and simultaneously open a return/exchange request through poshmark so the platform can mediate if the seller is slow to respond. Ask Poshmark to prioritize the case given the timing constraints and request a prepaid return label if an exchange is approved. If the seller is unresponsive, ask the platform to escalate the case and authorize a refund so a local replacement can be sourced quickly; running seller outreach and platform mediation in parallel speeds the resolution.

You don’t even realize how clutch this post is. Just when I was about to lose my mind trying to figure this out, your answer came through like a lifeline. Huge thanks.