Unfair unknown rules

I am disheartened with a new rule that I got to learn yesterday when I went to exchange some item. Apparently MRP no longer makes exchanges without a till slip. Please learn from xtrainer and tell your staff to always explain to customers your exchange policy. You can't set a rule and not care to tell the customer the implications that they might face should items not be suitable. It's just poor service and backward. I have been a loyal customer and never once abused the MRP system but I'm now tied with the same string as looters. It's not fair.