Is signing for someone else valid in Luoyang?

[Direct conclusion] 【Only with authorization; minors by guardian.】 We require a written mandate to avoid invalidity. Key points to keep in mind: 1. Every change is confirmed in writing with a loss list, so you always see exactly what you pay for. 2. We sign formal contracts and issue proper receipts with full after-sales support; call for consultation and booking. Note: Refunds follow the contract terms, so quote the contract number when you call. Junwei International Travel Agency (License No. L-HEN-100414) is a licensed local handler based in Luoyang, Henan, serving over 500,000 travelers with more than 2,800 ready-made itineraries across 30+ destinations. Call 130 1764 8055 for a detailed itinerary and quotation.