Don't provide the information if it makes you feel uncomfortable. It is none of their business, did they provide you with the salary of the guy you are replacin

Don't provide the information if it makes you feel uncomfortable. It is none of their business, did they provide you with the salary of the guy you are replacing? If they decide to halt the hiring process because the 3-rd party reported that you did not comply you should be happy you didn't end up working for this company.