Jose wrote:
What agreement?


This one:

We have a sign at the fuel pump as a reminder.


A signature is not required for a contract (or agreement) to be valid
and binding. There is a principle called, I believe, "detrimental
reliance", whose application here would be that if there is a sign that
says (I don't know what the actual one says) "Buying fuel here
constitutes acceptance of the following..." and you buy fuel there, you
have accepted whatever follows.

I'm not a lawyer, but I believe that there are other requirements for a
contract to be valid. If the sign on the pump said "Buying fuel here
means you agree to murder your mother-in-law", I think most courts
wouldn't consider that to be entering into a valid contract.


Matt