Short answer — it depends on what you’re buying and what “reliable” means (long window, free postage, easy refunds, consistent customer service). Two retailers that consistently rate highly for returns in Australia are:

• THE ICONIC — very customer‑friendly for fashion/footwear: long return windows (widely advertised as up to 100 days on many items) and free returns on eligible orders, so it’s one of the easiest places to change your mind on clothes/shoes. (ozcodes.com.au)

• Major marketplace/retail platforms (Amazon Australia and large department stores such as Myer / David Jones) — they offer predictable, well documented return processes and ACL protections. Amazon has a standard ~30‑day change‑of‑mind window for most items and a clear returns portal (marketplace seller rules vary, but Amazon’s A‑to‑Z/returns centre helps). Myer and David Jones offer about 30 days for “change of mind” returns and explicit in‑store/postal return options. For non-fashion categories (electronics, homewares, general merchandise) these big players are generally more reliable. (Ajust.com.au)

Quick guidance to choose the “most reliable” store for your purchase

• Fashion/apparel/shoes: THE ICONIC (long window + free returns on eligible items). (ozcodes.com.au)
• Electronics and general merchandise: Amazon Australia (easy portal, A‑to‑Z for marketplace problems) or big retailers (JB‑Hi‑Fi, Myer, David Jones) — but check each product page because seller/brand and item size/category can change the rules. (Ajust.com.au)
• Discount/marketplace sites (Kogan, Catch, eBay): policies vary by seller and product; more chance of exceptions and return fees — read the seller’s return terms before you buy. (Kogan.com)

Practical checklist to ensure a smooth return

• Check the product page for “Free returns” or the exact return window before buying. (Ajust.com.au)
• Keep proof of purchase/packing slip and follow the merchant’s return flow (their portal usually generates a prepaid label if free). (Myer.com.au)
• Remember Australian Consumer Law (ACL): if an item is faulty, not as described or not fit for purpose, you’re entitled to a remedy regardless of the merchant’s change‑of‑mind window — escalate to the retailer and, if needed, your state consumer affairs body. (Myer.com.au)

If you like, tell me what category (fashion, electronics, furniture, groceries, marketplace item, etc.) or a specific store you have in mind and I’ll compare the current return rules and highlight any fees or important exclusions for that category.