Rugby fans will only be able to purchase resold tickets through an official exchange service as the RFU clamp down on inflated prices.
England's governing body of rugby said resale websites such as Viagogo, Stub Hub, Gumtree, ebay, or Live Rugby Tickets "have no association or official arrangement with the RFU and often market tickets which do not exist on a speculative basis and at inflated prices".
The RFU insisted tickets sold outside the terms and conditions for England international purchases would be cancelled.
Supporters are being encouraged to offload spare tickers through an official exchange on the England Rugby ticketing website.
Stephen Brown, RFU chief executive, said: "Fans buying or selling tickets through unofficial channels are at risk of hugely inflated prices, mis-selling and fraud.
"We want people to be aware of our ticket policy and not risk their money by either unauthorised re-selling or buying tickets through unofficial means.
"We understand that not everyone who purchases a ticket is always able to attend on the day. Our ticket exchange ensures they can hand their ticket back and other fans can purchase at the correct price."