A label printing error might seem like a minor inconvenience, but in a Shopify fulfillment workflow it can delay dispatch, trigger underpaid postage charges, create tracking failures, and ultimately result in parcels going to the wrong address or not being processed through theAustralia Postnetwork correctly. Shopify generates the label at one size, but your printer settings use another, causing a cut-off, scaled, or blank printout. A4 (one label per page):Use this option with plain A4 paper or an A4-sized label. A6:Use this option with a printer that supports A6 paper, including compatible thermal printers. Fix:In MyPost Business, go toCarriers → MyPost Business → Print Settingsand select the label size that matches your physical paper or label stock.