If you are a principal and your commercial agent is in breach of the agreement, this may entitle you to terminate the agreement without the need to make certain post-termination payments to the commercial agent (if the breach is serious enough).  If you are an agent and the principal is in breach of the agreement, you may be able to take action to, for example, compel the principal to provide you with sales data and/or accept any repudiatory breach of the contract and bring the commercial agency to an end and retain your right to a termination payment.