a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS102 [Section] 6.2 [Statement text] 
When the Producer chooses to invalidate the registration identifier, it MUST inform the Consumer of this through a fault message on the next invocation specifying this registrationHandle so that the Consumer may release related resources.
WSRP v2.0 Specification
Statement text