| Nov 1, 2026 | Shopify | Shopify: EU product identifiers required from Nov 1 | Shopify Changelog |
| Nov 2, 2026 | Amazon | Amazon's $1M liability insurance rule for enhanced-safety categories kicks in Nov 2 | Amazon Seller Forums (official) |
| Nov 11, 2026 | TikTok Shop | TikTok Shop US sets BFCM rules: extra dispatch days from Nov 11 and returns open until Feb 10, 2027 | TikTok Shop US Seller University (Policy Pulse, October 2026) |
| Nov 12, 2026 | TikTok Shop | TikTok Shop US will lock shipping-fee estimates for shops flagged for excessive fees or weight changes from Nov 12 | TikTok Shop US Seller University (official) |
| Nov 12, 2026 | Shopify | Shopify makes IP allowlists mandatory for public apps by Nov 20 (bulk ops by Nov 12) | Shopify.dev changelog (official) |
| Nov 12, 2026 | Walmart | Walmart sets three holiday events: Nov 12–15, Nov 23–29, Nov 30–Dec 2 | Walmart Corporate |
| Nov 13, 2026 | Amazon | Amazon extends Black Friday and Cyber Monday deal sourcing to November 13 | Amazon Seller Forums (official announcement) |
| Nov 19, 2026 | Amazon | Amazon raises EU FBA fuel and logistics surcharge from 1.5% to 2% | Amazon Seller Forums (UK), official Amazon announcement |
| Nov 30, 2026 | Amazon | Amazon widens international FBA inbound receiving windows and refunds some fees for peak season | EcomCrew (reporting Amazon's October 30 Seller Central announcement) |
| Jan 2027 | Walmart | Walmart will warn or unpublish individual high-return items from January 2027, even if your overall Return Rate passes | Walmart Marketplace Learn release notes (official) |
| Jan 15, 2027 | Amazon | Amazon announces 2027 US FBA fee updates: +$0.19 average fulfillment fee from Jan 15; storage simplification from Feb 1 | Amazon Selling Partners (official; Sunny Jain, VP Worldwide FBA) |
| No fixed deadline — applies after 455 days inactive | Walmart | Walmart may suspend Marketplace accounts inactive for 455 days | Walmart Marketplace Learn |