Lets say I fulfill an order for a client (eg supply goods or a service). Both the client and I have published Terms and Conditions, and some of the terms clash. One states 65 day payment terms, the other says 30. One gives a procedure for interim payments that is different to the other. Whose terms are then valid? Also are there any rules against hiding unusual, irregular or unbalanced terms within the small print of the terms and condition? One supplier has made a rather unfair demand and stated it's in his terms. I've now read his terms and he was lying, but I'd like to know for future reference. Thanks!