Fran Cotton, a former England captain and an influential member of the RFU, said: 'The RFU will be asking for proof to be provided. In that event, it would be referred to the disciplinary officer to see whether there is a case to be answered.'
Robert Horner, the RFU's disciplinary officer, said: 'The allegations are very general and unspecific. They do not indicate whether any of the current squad is allegedly involved. I will look at it but we will need something more specific.'
England players are allowed three free tickets and the chance to buy seven more.
With the Union able to trace every ticket back to its original purchaser, at least six English clubs have had their international ticket allocation suspended after tickets supplied to them ended up on the black market. The England players' Code of Conduct prohibits the resale of tickets above face value.
Back in the amateur days, selling tickets was viewed as a perk, especially on Lions tours where players could make up to £1,000-a-man to compensate, in some cases, for a loss of earnings.
