In 2026, Indian Railways has strictly enforced a rule that online waitlisted (WL) tickets are not valid for travel if they do not confirm before the final chart is prepared. If your online ticket remains on the waiting list after charting, it is automatically cancelled by the system and a refund is issued; boarding a reserved Sleeper or AC coach with such a ticket is considered "traveling without a ticket" and can lead to heavy fines (up to ₹440) and being asked to leave the train at the next station. However, if you purchased a physical waitlisted ticket from a station counter, you are permitted to travel, but only in the General (Unreserved) coaches. You are strictly prohibited from entering the reserved Sleeper or AC compartments. For 2026 travelers, the "pro-tip" is to always check your PNR status four hours before departure to ensure you have a "CNF" (Confirmed) or "RAC" status.