This is another example of passenger ignorance of the rules and regulations regarding tickets. It also shows that in genuine mistake situations people can take umbridge at having to pay a penalty or purchase a new ticket. This leads to refusing to pay as the demand seems unreasonable in the circumstance. They assume by not paying something cheaper can be negotiated later, little do they know! I wonder how many times the railway official in these situations actually tells the passenger that the next step very likely will be a court summons which could lead in some circumstances to a criminal record. I have no seen it said on this forum that rail staff have to explain this, but I feel that if people are not advised of the enormity of what is likely to happen next they may be inclined to change their mind. Yes it is buyer beware but to many innocent travellers the draconian railway legislation is completely unknown and unexpected.