I have sent my builder a notice of breach of the contract, referencing the breaches in the contract and giving them 14 days to remedy or else I will be reconsidering their employment. The letter has been sent registered post to the address noted on the contract being the physical address of the builder's factory even though he has a PO BOX on his invoices. My question is what happens if there is an attempted delivery to the factory and a card is left by auspost but the builder refuses to collect it from the post office? He is probably anticipating the letter as he has not turned up to do any works in weeks for a commercial fit out. Does the 14 days still count from the day of attempted delivery?