{"id":4096,"date":"2026-08-03T10:00:00","date_gmt":"2026-08-03T00:00:00","guid":{"rendered":"https:\/\/printshop.paperlust.co\/blog\/?p=4096"},"modified":"2026-07-22T14:52:38","modified_gmt":"2026-07-22T04:52:38","slug":"letterbox-drop-rules-australia","status":"publish","type":"post","link":"https:\/\/printshop.paperlust.co\/blog\/letterbox-drop-rules-australia","title":{"rendered":"Letterbox Drop Rules in Australia: What You Can and Can&#8217;t Do"},"content":{"rendered":"<style>\n#post-4096 .entry-content p { font-size:20px; line-height:1.7; }\n#post-4096 .entry-content h2 { font-size:34px; line-height:1.3; text-transform:none; margin-top:48px; }\n#post-4096 .entry-content h3 { font-size:24px; line-height:1.35; text-transform:none; margin-top:32px; }\n#post-4096 .entry-content ul, #post-4096 .entry-content ol { font-size:20px; line-height:1.7; }\n#post-4096 .entry-content table { font-size:16px; line-height:1.5; }\n#post-4096 .entry-content th { background:#1a1a1a; color:#fff; padding:10px; text-align:left; }\n#post-4096 .entry-content td { padding:10px; border-bottom:1px solid #e5e5e5; }\n@media (max-width:768px) {\n  #post-4096 .entry-content p,\n  #post-4096 .entry-content ul,\n  #post-4096 .entry-content ol { font-size:18px; }\n  #post-4096 .entry-content table { font-size:14px; }\n}\n<\/style>\n<p>Every suburb has them: letterboxes plastered with &#8220;No Junk Mail&#8221; or &#8220;No Advertising Material&#8221; stickers. If you&#8217;re planning a flyer run to promote your business, those two small signs raise a surprisingly large question. Are you legally required to skip them? Does it depend on how you&#8217;re distributing? And what actually happens if you don&#8217;t?<\/p>\n<p>The answer is more nuanced than most business owners expect. Here&#8217;s what actually applies to you.<\/p>\n<div style=\"background:#f8f6f3;border-left:4px solid #c9a96e;padding:16px 20px;margin:20px 0;\">\n<strong>Quick answer: letterbox drop rules in Australia<\/strong><\/p>\n<ul style=\"margin:8px 0 0 0;padding-left:18px;\">\n<li>&#8220;No Junk Mail&#8221; and &#8220;No Advertising Material&#8221; stickers carry different obligations for different distributors.<\/li>\n<li>Australia Post&#8217;s Unaddressed Mail service automatically excludes opted-out letterboxes when you book a campaign.<\/li>\n<li>DSB-registered distributors (IVE Group, Adpost, Hi-Fliers, etc.) are contractually bound to skip &#8220;No Advertising Material&#8221; letterboxes.<\/li>\n<li>Independent distributors organising their own runs are not legally bound in most states.<\/li>\n<li>Queensland is the exception: state law makes it an offence to deliver unsolicited commercial advertising to homes displaying appropriate signage.<\/li>\n<li>Always exempt from all signage: electoral material, registered charities, government communications, community newspapers (until written notice from the resident).<\/li>\n<li>Tucking flyers under car wipers or leaving materials on fences is illegal under litter laws nationwide.<\/li>\n<\/ul>\n<\/div>\n<h2>&#8220;No Junk Mail&#8221; versus &#8220;No Advertising Material&#8221;: not the same sticker<\/h2>\n<p>Both stickers communicate that the householder doesn&#8217;t want unsolicited material. But the coverage, enforcement, and legal weight differ significantly.<\/p>\n<h3>&#8220;No Junk Mail&#8221;<\/h3>\n<p>&#8220;No Junk Mail&#8221; is the everyday-language version. Australia Post&#8217;s delivery officers are instructed not to deliver unaddressed material to any letterbox displaying this message. For Australia Post&#8217;s Unaddressed Mail service, compliance is automatic: opted-out letterboxes are excluded from your delivery count before the run starts.<\/p>\n<p>The limitation is scope. Australia Post delivers roughly 10 per cent of Australia&#8217;s unaddressed mail. For the other 90 per cent, handled by private distributors and independent operations, &#8220;No Junk Mail&#8221; carries no binding legal obligation outside of Queensland.<\/p>\n<h3>&#8220;No Advertising Material&#8221;<\/h3>\n<p>&#8220;No Advertising Material&#8221; is the industry-specific instruction. It maps directly to the Distribution Standards Board&#8217;s (DSB) Code of Practice. Any distributor that is a DSB member is contractually required to skip letterboxes displaying this sign.<\/p>\n<p>The DSB Code does not cover real estate agents leafleting their own listings, a cafe owner organising their team to hand-deliver menus, or an individual running their own neighbourhood drop. These operations fall entirely outside the DSB&#8217;s jurisdiction.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:20px 0;\">\n<thead>\n<tr style=\"background:#1a1a1a;color:#fff;\">\n<th style=\"padding:11px 16px;text-align:left;\">Sticker type<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">Australia Post Unaddressed Mail<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">DSB-member distributor<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">Independent distributor<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">No Junk Mail<\/td>\n<td style=\"padding:11px 16px;\">Will not deliver<\/td>\n<td style=\"padding:11px 16px;\">Typically honours<\/td>\n<td style=\"padding:11px 16px;\">No binding obligation<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">No Advertising Material<\/td>\n<td style=\"padding:11px 16px;\">Will not deliver<\/td>\n<td style=\"padding:11px 16px;\">Bound by Code of Practice<\/td>\n<td style=\"padding:11px 16px;\">No binding obligation<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Addressed Mail Only<\/td>\n<td style=\"padding:11px 16px;\">Will not deliver<\/td>\n<td style=\"padding:11px 16px;\">Typically honours<\/td>\n<td style=\"padding:11px 16px;\">No binding obligation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<figure class=\"wp-block-image ps-blog-img\" style=\"margin:32px auto;text-align:center;max-width:100%;\"><img decoding=\"async\" src=\"https:\/\/printshop.paperlust.co\/blog\/wp-content\/uploads\/2026\/07\/letterbox-drop-rules-australia-inl1.jpg\" alt=\"Two Australian residential letterboxes photographed side by side\" data-no-lazy=\"1\" style=\"max-width:100%;height:auto;border-radius:4px;\" \/><figcaption class=\"wp-element-caption\" style=\"font-size:0.85em;line-height:1.45;color:#666;margin-top:8px;text-align:center;\">Two Australian residential letterboxes photographed side by side<\/figcaption><\/figure>\n<h2>Who&#8217;s distributing &#8211; and who&#8217;s bound by what<\/h2>\n<p>Your compliance obligations depend almost entirely on how you choose to distribute.<\/p>\n<h3>Australia Post&#8217;s Unaddressed Mail service<\/h3>\n<p>Australia Post&#8217;s Unaddressed Mail service gives businesses access to up to 12.7 million letterboxes for community notices, or up to 9.3 million letterboxes for commercial advertising. Material is delivered Monday to Friday during your nominated delivery week.<\/p>\n<p>When you use this service, opt-out letterboxes are managed for you. Your campaign quantity reflects the actual deliverable letterboxes in your selected area, not a raw postcode total. Bookings require advance notice, particularly during election periods when capacity is reduced due to demand from political campaigns.<\/p>\n<h3>DSB-registered distributors<\/h3>\n<p>The Distribution Standards Board is the self-regulatory body for the letterbox distribution industry in Australia. Member companies include IVE Group (operating nationally), Adpost Online, GDR Marketing, Gold Coast Leaflet Distributors, Hi-Fliers and Fermax in Victoria, among others.<\/p>\n<p>When you hire a DSB-registered company, their walkers operate from mapped routes that exclude opted-out letterboxes. Compliance is the distributor&#8217;s contractual obligation, which makes it their risk rather than yours.<\/p>\n<h3>Organising your own distribution<\/h3>\n<p>If you&#8217;re coordinating your own drop using staff, volunteers, or a casual crew, you&#8217;re operating entirely outside Australia Post and the DSB. In most states, there is no law requiring you to honour &#8220;No Junk Mail&#8221; or &#8220;No Advertising Material&#8221; signs. Queensland is the legal exception (see below).<\/p>\n<p>The practical point is this: households with opt-out stickers have explicitly chosen not to receive promotional material. Your conversion rate from those letterboxes will almost certainly trail your campaign average. Skipping them is not only more respectful, it improves your campaign economics and reduces the print quantity you need to order.<\/p>\n<h2>State-by-state: is there a law?<\/h2>\n<p>There is no single national law governing physical unaddressed letterbox distribution. The Spam Act 2003 covers electronic communications and does not apply to print material. State and territory regulation is inconsistent.<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:20px 0;\">\n<thead>\n<tr style=\"background:#1a1a1a;color:#fff;\">\n<th style=\"padding:11px 16px;text-align:left;\">State \/ Territory<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">Law on opt-out signage<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">What it means in practice<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Queensland<\/td>\n<td style=\"padding:11px 16px;\">Yes &#8211; Waste Reduction and Recycling Act<\/td>\n<td style=\"padding:11px 16px;\">Offence to deliver unsolicited commercial advertising to homes displaying appropriate opt-out signage<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">New South Wales<\/td>\n<td style=\"padding:11px 16px;\">No specific law<\/td>\n<td style=\"padding:11px 16px;\">Industry self-regulation (DSB Code of Practice) only<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Victoria<\/td>\n<td style=\"padding:11px 16px;\">No specific law<\/td>\n<td style=\"padding:11px 16px;\">Industry self-regulation (DSB Code of Practice) only<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">South Australia<\/td>\n<td style=\"padding:11px 16px;\">No specific law<\/td>\n<td style=\"padding:11px 16px;\">Industry self-regulation (DSB Code of Practice) only<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Western Australia<\/td>\n<td style=\"padding:11px 16px;\">No specific law<\/td>\n<td style=\"padding:11px 16px;\">Industry self-regulation (DSB Code of Practice) only<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">ACT, NT, Tasmania<\/td>\n<td style=\"padding:11px 16px;\">No specific law<\/td>\n<td style=\"padding:11px 16px;\">Industry self-regulation (DSB Code of Practice) only<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Queensland&#8217;s Waste Reduction and Recycling Act defines &#8220;unsolicited advertising material&#8221; as commercial advertising not addressed by name to the resident. When a resident displays &#8220;No Advertising Material,&#8221; &#8220;No Junk Mail,&#8221; or &#8220;Australia Post Mail Only&#8221; signage on their letterbox, delivering to that household is prohibited. Enforcement is complaint-driven rather than involving proactive inspection.<\/p>\n<p>Outside Queensland, the DSB&#8217;s voluntary Code remains the main check on industry conduct. ADMA (the Association for Data-driven Marketing and Advertising) operates a Do Not Mail register for addressed promotional mail from member organisations, but this does not apply to unaddressed letterbox drops.<\/p>\n<figure class=\"wp-block-image ps-blog-img\" style=\"margin:32px auto;text-align:center;max-width:100%;\"><img decoding=\"async\" src=\"https:\/\/printshop.paperlust.co\/blog\/wp-content\/uploads\/2026\/07\/letterbox-drop-rules-australia-inl2.jpg\" alt=\"A stylised map of Australia with Queensland visually highlighted alongside a letterbox distribution icon\" data-no-lazy=\"1\" style=\"max-width:100%;height:auto;border-radius:4px;\" \/><figcaption class=\"wp-element-caption\" style=\"font-size:0.85em;line-height:1.45;color:#666;margin-top:8px;text-align:center;\">A stylised map of Australia with Queensland visually highlighted alongside a letterbox distribution icon<\/figcaption><\/figure>\n<h2>What&#8217;s always exempt from opt-out signage<\/h2>\n<p>Every sticker type has recognised exemptions. Material that can be delivered regardless of what the letterbox displays includes:<\/p>\n<ul>\n<li>Electoral and political campaign material<\/li>\n<li>Material from registered charities<\/li>\n<li>Religious and educational material<\/li>\n<li>Government and council communications<\/li>\n<li>Community newspapers, until the resident formally notifies the publisher in writing<\/li>\n<li>Statutory notices and infringement notices (parking fines, etc.)<\/li>\n<li>Lost animal notices<\/li>\n<\/ul>\n<p>These exemptions apply across all states and within the DSB&#8217;s Code of Practice. If you&#8217;re distributing on behalf of a registered charity or running an electoral campaign, opt-out stickers do not restrict your delivery.<\/p>\n<h2>How to plan a compliant letterbox drop<\/h2>\n<p>A structured approach protects your brand, respects residents, and improves return on your print investment.<\/p>\n<h3>Choose your distribution method first<\/h3>\n<p>For large-scale or multi-suburb campaigns, book Australia Post&#8217;s Unaddressed Mail service: opt-outs are managed automatically and you get verified postcode-level targeting up to the national letterbox pool. For regional or suburb-level campaigns, hire a DSB-registered distributor. For hyper-local drops around a new shopfront or upcoming event, organise your own team &#8211; but honour every sticker you encounter.<\/p>\n<h3>Factor opt-outs into your quantity planning<\/h3>\n<p>Urban areas typically see 15 to 25 per cent of letterboxes displaying some form of opt-out signage. Inner-suburban and more affluent postcodes tend toward the upper end of that range. If you&#8217;re planning a 5,000-piece run for a 6,000-household catchment, budget for effective coverage of around 4,500 to 5,000 households after opt-outs. Australia Post&#8217;s Unaddressed Mail booking tools provide accurate deliverable-letterbox counts by postcode so you can calibrate your print order precisely.<\/p>\n<h3>Pick the right format for letterbox delivery<\/h3>\n<p>Not every print format suits unaddressed letterbox delivery. DL (99 x 210 mm) is the industry standard for a practical reason: it slots into almost every residential letterbox slot without folding or creasing on arrival. A5 (148 x 210 mm) and A6 (148 x 105 mm) also work well. A4 (210 x 297 mm) fits most letterboxes but shows handling marks more readily and can feel forced into narrower slots.<\/p>\n<p>For campaigns that need more space than a single flyer allows, <a href=\"\/products\/dl-booklets?utm_source=paperlust&amp;utm_medium=internal_link&amp;utm_campaign=tierb_blog\">DL booklets<\/a> give you multi-page content in the same letterbox-compatible format, well suited to service menus, seasonal catalogues, or multi-offer campaigns. For single-offer promotions where visual impact matters more than information density, <a href=\"\/products\/postcard?utm_source=paperlust&amp;utm_medium=internal_link&amp;utm_campaign=tierb_blog\">custom-printed postcards<\/a> on heavier stock stand out in the letterbox pile and tend to be kept rather than recycled immediately.<\/p>\n<p>For the primary drop piece itself, <a href=\"\/products\/flyers?utm_source=paperlust&amp;utm_medium=internal_link&amp;utm_campaign=tierb_blog\">professionally printed flyers<\/a> across DL, A6, A5, A4, and A3 in stock weights from 115 gsm to 250 gsm give you the flexibility to match format to campaign scale. Production is 2 to 5 working days after proof approval, with flat-rate shipping of $10 AUD Australia-wide.<\/p>\n<h3>Target by audience profile, not just geography<\/h3>\n<p>Raw postcode coverage is the starting point for targeting, not the complete strategy. ABS demographic data is publicly available at the suburb level and covers income brackets, household composition, and age cohort. Mapping this against your ideal customer profile lets you prioritise postcodes before you print a single sheet, rather than blanketing an entire area and hoping for the best.<\/p>\n<figure class=\"wp-block-image ps-blog-img\" style=\"margin:32px auto;text-align:center;max-width:100%;\"><img decoding=\"async\" src=\"https:\/\/printshop.paperlust.co\/blog\/wp-content\/uploads\/2026\/07\/letterbox-drop-rules-australia-inl3.jpg\" alt=\"Flat lay on a neutral surface showing three print formats side by side\" data-no-lazy=\"1\" style=\"max-width:100%;height:auto;border-radius:4px;\" \/><figcaption class=\"wp-element-caption\" style=\"font-size:0.85em;line-height:1.45;color:#666;margin-top:8px;text-align:center;\">Flat lay on a neutral surface showing three print formats side by side<\/figcaption><\/figure>\n<h2>Quick reference: do&#8217;s and don&#8217;ts<\/h2>\n<table style=\"width:100%;border-collapse:collapse;margin:20px 0;\">\n<thead>\n<tr style=\"background:#1a1a1a;color:#fff;\">\n<th style=\"padding:11px 16px;text-align:left;\">Do<\/th>\n<th style=\"padding:11px 16px;text-align:left;\">Don&#8217;t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Skip letterboxes with any opt-out sticker displayed<\/td>\n<td style=\"padding:11px 16px;\">Deliver to stickered letterboxes in Queensland (it&#8217;s a statutory offence)<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">Hire a DSB-registered distributor for suburb-scale or larger campaigns<\/td>\n<td style=\"padding:11px 16px;\">Assume non-DSB distributors manage opt-outs on your behalf<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Use Australia Post Unaddressed Mail for automatic opt-out exclusion<\/td>\n<td style=\"padding:11px 16px;\">Tuck flyers under car windscreen wipers (illegal under litter laws)<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">Factor 15 to 25 per cent opt-out rate into your quantity calculation<\/td>\n<td style=\"padding:11px 16px;\">Leave materials on fences, gates, or in public spaces where they could become litter<\/td>\n<\/tr>\n<tr style=\"background:#f9f9f9;\">\n<td style=\"padding:11px 16px;\">Choose letterbox-compatible formats: DL, A5, or A6<\/td>\n<td style=\"padding:11px 16px;\">Treat &#8220;No Junk Mail&#8221; and &#8220;No Advertising Material&#8221; as identical obligations for all distributors<\/td>\n<\/tr>\n<tr style=\"background:#fff;\">\n<td style=\"padding:11px 16px;\">Brief your distribution team on which stickers require skipping<\/td>\n<td style=\"padding:11px 16px;\">Rely on non-DSB-member distributors without confirming their opt-out process in writing<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Frequently asked questions<\/h2>\n<h3>Is it illegal to put flyers in letterboxes with &#8220;No Junk Mail&#8221; stickers?<\/h3>\n<p>In Queensland, yes. The Waste Reduction and Recycling Act makes it an offence to deliver unsolicited commercial advertising to homes displaying appropriate opt-out signage. In New South Wales, Victoria, South Australia, Western Australia, and the territories, there is no equivalent state law for physical distribution, but DSB-registered distributors are contractually required to skip opted-out letterboxes under their Code of Practice. If you&#8217;re organising your own distribution in those states, honouring the stickers is the right practice even without a legal mandate.<\/p>\n<h3>Does Australia Post skip letterboxes with &#8220;No Junk Mail&#8221; stickers?<\/h3>\n<p>Yes. Australia Post&#8217;s delivery officers are instructed not to deliver unaddressed mail to any letterbox displaying a &#8220;No Junk Mail&#8221; or &#8220;Addressed Mail Only&#8221; sign. When you book Australia Post&#8217;s Unaddressed Mail service, opted-out letterboxes are automatically excluded from your delivery quantity and are not counted in your campaign reach figures.<\/p>\n<h3>What&#8217;s the difference between &#8220;No Junk Mail&#8221; and &#8220;No Advertising Material&#8221; stickers?<\/h3>\n<p>&#8220;No Junk Mail&#8221; is everyday-language that Australia Post honours and many distributors respect by policy. &#8220;No Advertising Material&#8221; is the industry term codified in the DSB&#8217;s Code of Practice: member distributors are contractually required to skip those letterboxes. Both communicate the same preference to residents. &#8220;No Advertising Material&#8221; has stronger enforcement teeth within the commercial letterbox distribution industry because it maps directly to a contractual obligation on DSB members.<\/p>\n<h3>Can I deliver to opt-out letterboxes if I&#8217;m a charity or political campaign?<\/h3>\n<p>Yes. Electoral and political campaign material, registered charity notices, religious and educational material, government and council communications, and community newspapers are all exempt from opt-out signage requirements. These exemptions apply under Australia Post&#8217;s policy, the DSB&#8217;s Code of Practice, and Queensland&#8217;s legislation. If you&#8217;re unsure whether your specific material qualifies as exempt, confirm with the DSB (1300 083 241) or Australia Post&#8217;s Unaddressed Mail team before your run.<\/p>\n<h3>How many letterboxes will opt-outs affect in a typical suburb?<\/h3>\n<p>There is no single national figure, but urban and inner-suburban areas typically see 15 to 25 per cent of letterboxes displaying some form of opt-out signage. Affluent inner-suburb postcodes trend toward the upper end of that range. For campaign planning, budget for up to 20 per cent reduction from your raw household count when calculating your required print quantity.<\/p>\n<h3>What print formats work best for letterbox drops?<\/h3>\n<p>DL (99 x 210 mm) is the industry standard for letterbox delivery, fitting into almost every residential slot without creasing. A5 (148 x 210 mm) and A6 (148 x 105 mm) are also well-suited. A4 (210 x 297 mm) fits most letterboxes but can show handling marks more readily. For campaigns needing more than a single-page overview, DL booklets give you multi-page content in the same letterbox-friendly form factor. For single-offer promotions where visual impact is the priority, postcards on a heavier stock tend to be retained rather than recycled on arrival.<\/p>\n<h2>Related reading<\/h2>\n<ul>\n<li><a href=\"https:\/\/printshop.paperlust.co\/blog\/flyer-printing-australia\">Flyer printing in Australia: sizes, stocks, and what to order<\/a><\/li>\n<li><a href=\"https:\/\/printshop.paperlust.co\/blog\/how-many-flyers-print-run\">How many flyers should you print? Quantities and cost per unit explained<\/a><\/li>\n<li><a href=\"https:\/\/printshop.paperlust.co\/blog\/flyer-design-that-converts\">Flyer design that converts: what actually works in print<\/a><\/li>\n<\/ul>\n<p><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"Is it illegal to put flyers in letterboxes with \\\"No Junk Mail\\\" stickers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"In Queensland, yes. The Waste Reduction and Recycling Act makes it an offence to deliver unsolicited commercial advertising to homes displaying appropriate opt-out signage. In New South Wales, Victoria, South Australia, Western Australia, and the territories, there is no equivalent state law for physical distribution, but DSB-registered distributors are contractually required to skip opted-out letterboxes under their Code of Practice.\"}},{\"@type\":\"Question\",\"name\":\"Does Australia Post skip letterboxes with \\\"No Junk Mail\\\" stickers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes. Australia Post's delivery officers are instructed not to deliver unaddressed mail to any letterbox displaying a No Junk Mail or Addressed Mail Only sign. When you book Australia Post's Unaddressed Mail service, opted-out letterboxes are automatically excluded from your delivery quantity and are not counted in your campaign reach figures.\"}},{\"@type\":\"Question\",\"name\":\"What's the difference between \\\"No Junk Mail\\\" and \\\"No Advertising Material\\\" stickers?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"No Junk Mail is everyday-language that Australia Post honours and many distributors respect by policy. No Advertising Material is the industry term codified in the Distribution Standards Board's Code of Practice: member distributors are contractually required to skip those letterboxes. 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Affluent inner-suburb postcodes trend toward the upper end of that range. For campaign planning, budget for up to 20 per cent reduction from your raw household count when calculating your required print quantity.\"}},{\"@type\":\"Question\",\"name\":\"What print formats work best for letterbox drops?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"DL (99 x 210 mm) is the industry standard for letterbox delivery, fitting into almost every residential slot without creasing. A5 (148 x 210 mm) and A6 (148 x 105 mm) are also well-suited. A4 (210 x 297 mm) fits most letterboxes but can show handling marks more readily. 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