How do users opt in? 17 April 2023 04:03 Updated Users may opt in by following these steps: Related articles What is included in the POSM set? Is there an opt-in fee and is it reversible? What is P2P seller? Is there any MDR charges for P2P seller QR payment? What if I haven’t received my POSM set after 14 working days, or if my set is damaged?