Section 129 of the National Credit Act requires a credit provider to deliver a notice to a consumer before commencing debt enforcement proceedings. Delivery under sections 129 and 130 means taking steps that would bring the notice to the attention of a reasonable consumer, not bringing it to their subjective attention. Where a consumer has elected to receive notices by registered mail, delivery ordinarily consists of: (a) dispatching the notice by registered mail; (b) ensuring it reaches the correct Post Office branch for the consumer's collection; and (c) ensuring the Post Office notifies the consumer at their designated address that a registered item awaits collection. Once these steps are proven (typically through track-and-trace reports), delivery is established unless there is a contrary indication showing that, despite the credit provider's efforts, a reasonable consumer would not have received or collected the notice. A consumer who unreasonably fails to collect a properly sent notice after receiving notification from the Post Office cannot claim non-delivery to defeat enforcement proceedings. The Act imposes reciprocal obligations: credit providers must take reasonable steps to deliver notices, and consumers must act reasonably in engaging with properly sent notices. The concept of a 'reasonable consumer' is grounded in section 3 of the Act, which emphasizes responsible borrowing, fulfillment of financial obligations, and discouraging contractual default.