The four payment message standards to be observed are: i) FIs should not omit, delete, or alter information in payment messages or orders for the purpose of avoiding detection of that information by any other FI in the payment process; ii) FIs should not use any particular payment message for the purpose of avoiding detection of information by any other FI in the payment process; iii) Subject to applicable laws, FIs should cooperate as fully as practicable with other FIs in the payment process when requesting to provide information about the parties involved; and (iv) FIs should strongly encourage their correspondent banks to observe these principles.