Sellers moving to their 2nd/3rd marketplace do the most dangerous thing: "duplicate the listing to a new backend and go live". The same USB charger needs FCC+UL+Prop65 for the US; CE LVD/EMC/RED+RoHS+WEEE+REACH+GPSR for EU; PSE+VCCI+METI for JP. Missing one line = listing down.

🔎 One-liner: before launching a new marketplace, build one matrix: marketplace × category × mandatory rules and fill every cell against your real SKUs before listing.

1. Five markets × six product families — the mandatory gate matrix

Site \ CategoryElectronicsToys (≤14)Cosmetics / PCFood-contactApparel / textilesFurniture / cribs 🇺🇸 USFCC SDOC/ID + UL/ETL (platform) + Prop 65CPSIA + ASTM F963 + tracking labelVCRP rec'd + FDA colorants + GMPFDA 21 CFR + Prop 65 Pb/CdFTC textile label + 16 CFR 1610 FR16 CFR 1633 mattress FR + ASTM F1169 crib 🇪🇺 EUCE LVD/EMC + RED + RoHS + WEEE + REACH + GPSREN 71-1~11 + Toy Dir + REACH + GPSRCPNP + 2023/1545 + PIF1935/2004 + EU 10/2011 + LFGB(DE)REACH + label + GPSRGPSR + REACH + EN 1725 🇯🇵 JPDENAN PSE + VCCI + METI notif.ST 2026 + FHL mouthing + PSCPal Affairs Act + import notif.FHL Food Hygiene Law + equipment stdHousehold Quality Labelling + Fire Law FRPSC mark (cribs etc.) 🇦🇺 AU/NZAS/NZS CISPR 32 + SAA RCM + GEMSAS/NZS ISO 8124-1~3 + mandatory bansICRSS + TGA class + ACCC claimsFSANZ Food Standards CodeACL + AS 2001 labelsAS/NZS 4220 + AS/NZS 2172 crib 🇨🇦 CAICES-003 + RSS-Gen + SOR/2016-181SOR/2011-17 + CCPSA + small-parts banHC Cosmetic Notification (Health Canada)Food & Drugs Act Div 23 + SOR/2016-171Textile Labelling Act + CCPSASOR/2016-180 bedding + SOR/2016-152 crib

2. Shareable compliance assets (saves you a fortune)

✅ CAN share across sites: general chemistry test (RoHS/REACH/azo/formaldehyde/colour fastness from an ISO 17025 lab), factory audits (BSCI/SMETA/SA8000), material certs (FSC/GRS/GOTS).
❌ CANNOT share — per-market only: national cert marks (CE/FCC/PSE/SAA/ICES), national product notifications (CPNP/VCRP/HC/MHLW), in-market Responsible Person (EU Econ Op / US Agent / JP ACP), per-country takeback (DE WEEE / FR Triman / AT EAR).

3. Three real-world traps

⚠️ UL report from US used as CE proof on EU store → CE rejected; needs EN-standard test + CE DoC → listing suspended.
⚠️ CE docs sent to JP for PSE gate → Japan does not accept CE; for radio devices must have independent VCCI + METI registration.
⚠️ Forgot per-market takeback / WEEE / battery / packaging regs — each country has its own independent portal and registration.

4. Four-step compliance kickoff

1️⃣ Populate your real SKUs into the matrix above; list every mandatory regulation per SKU per market.
2️⃣ First run all "shareable" panels as one bundle (e.g. REACH + azo + formaldehyde serves 5 markets).
3️⃣ Register market-by-market marks, notifications and RPs; print per-market info on per-market packaging.
4️⃣ Rewrite listings per-market independently; strip market-specific restricted wording (therapeutic claims, FDA "cure", medical-device words).