MerchantBastion Support Center & Quick-Start Guide
Need direct store onboarding help, retired Aelia EU VAT migration assistance, or instant Shopify and WordPress.org App Review test credentials? Everything is documented below—or reach our engineers directly.
Response within 4h for Reviewers & Pro/Agency, 12h for all tiers.
GDPR Art. 28 DPAs, webhook logs & data inquiries.
Lemon Squeezy VAT invoices, bundle upgrades & refunds.
2-Minute Shopify Setup (No External Password)
- 1-Click Install & Authenticate: Open the app directly inside Shopify Admin via App Bridge v4 session tokens—zero external website passwords.
- App 01 (VIES + US MTC + AU ABN): Enter your Seller VAT or ABN ID in Settings, enable the sub-8 KB Cart Drawer VAT Block in Online Store → Customize → App Embeds, and verify the active Cart & Checkout Validation rule under Settings → Checkout.
- App 02 (ShieldPack Chargeback PDF): Select any disputed order (or load a verified sample scenario) and click Generate Bank-Ready Defense PDF (<4.5 MB).
- App 03 (3-Continent GPSR / CPSC / UKCA): Assign your Manufacturer & EU/UK Responsible Person profile once, validate GTIN and Prop 65 chemicals, add the GPSR Product Safety Block to your product template, and export 50x30 mm or 4x6 in thermal labels.
- App 04 (ADA + CCPA Sec-GPC:1 + EU EAA): Run a diagnostic catalog scan, apply 1-click semantic Product Media
alt& ARIA repairs, toggle on the sub-8 KB Semantic Keyboard & Sec-GPC:1 Helper App Embed, and publish your 24-language Accessibility Statement.
2-Minute WooCommerce HPOS & Aelia Migration
- Upload Free Plugin .ZIP or Install from WordPress.org: Navigate to WP Admin → Plugins → Add New → Upload Plugin and activate
eu-vies-vat-shield,eu-gpsr-dpp-label-passport, orada-eaa-gpc-source-fixer. Paid tiers unlock by pasting your emailed Lemon Squeezy License Key. - Automatic HPOS & Checkout Blocks Compatibility: All plugins declare native compatibility with High-Performance Order Storage (HPOS) and WooCommerce Checkout Blocks—storing B2B VAT, US Resale Certificate IDs, and AU ABN metadata strictly via modern HPOS order methods.
- 1-Click Retired Aelia EU VAT Assistant Migrator: In WooCommerce → VIES VAT Shield, click Migrate Historical Aelia VAT Meta to map legacy Aelia order VAT fields into HPOS audit tables without losing historical tax proofs.
- 24-Language Accessibility Shortcode: Place
[mb_accessibility_statement]on any WordPress page to render your localized US ADA + CCPA GPC + 24-EU-Language EAA conformance statement with scannable QR verification.
App Reviewer 2-Minute Verification Guide & Test Numbers
Reviewers can verify all deterministic checksums, live VIES and outage flows, shipping-state fraud locks, PDF generation, and 24-language statements on any fresh Development Store or WordPress Playground instance using the verified public test identifiers below:
1. EU VIES & Northern Ireland XI Test Numbers
NL820646660B01FR22424761419DE129273398 · Belfast BT1 5GS (→ XI)2. Australia ABR ABN & US State Resale Permits
51 824 753 556 (ATO Public ABN)12 345 678 901 (Invalid Checksum)17428910452 (Test TX → TX vs. TX → CA Lock)TF8842109 (Valid NY Certificate of Authority)Technical & Compliance FAQ
Do I need to create a separate MerchantBastion username and password?
No. Shopify apps authenticate directly inside Shopify Admin via 1-click OAuth and bill on your monthly Shopify invoice. WooCommerce plugins run immediately on the €0 / $0 Free tier and unlock paid tiers via an emailed Lemon Squeezy License Key. Accountant CSV batches run directly in the browser using an emailed Access Key.
What happens when a national EU VIES database goes offline?
MerchantBastion never grants unsafe blind 0% VAT to unverified numbers. First, if the corporate buyer was verified within the past 30 days, our HMAC-signed cache preserves 0% Reverse Charge while queuing a fresh 16-digit VIES consultation proof refresh. For first-time buyers during an outage, VAT is collected safely as a deposit and queued for 1-click refund alert ($9 Starter) or zero-touch automated partial VAT refund ($19 Pro) the moment VIES recovers.
Why do you avoid floating accessibility "overlay" widgets in App 04?
Cosmetic single-line overlay toolbars do not repair underlying broken HTML for screen readers (NVDA, JAWS, VoiceOver) and have faced regulatory enforcement scrutiny. App 04 operates with zero fake overlay widgets—writing real semantic alt attributes to Product Media, injecting lightweight sub-8 KB keyboard focus and skip-link landmarks via Theme App Extensions without modifying theme files, and honoring browser Sec-GPC: 1 privacy opt-outs with 0% traffic tax.
Are all 24 official EU languages unlocked on Starter and Free tiers?
Yes. Locking mandatory EU destination languages behind enterprise tiers exposes small merchants to GPSR Article 19(d) and EAA Annex V non-compliance. Every MerchantBastion tier unlocks all 24 official EU languages from Day 1; tiers scale fairly by active SKU, page, or dossier volume.
How does the US State Resale Certificate shipping-state lock work?
If a wholesale buyer submits an ESIGN-signed Texas (TX) resale certificate (MTC or SST Form F0003) in the B2B Vault but attempts to ship an order to California (CA) without a valid CA CDTFA-230 permit on file, both our checkout validator and Rust/Wasm Checkout Validation Function automatically block tax exemption for that mismatched destination state.
What happens if my store exceeds its monthly quota on a weekend?
Paid plans automatically activate a 48-Hour Fair Grace Period so live checkouts and urgent dispute filings continue without interruption. Even if you choose not to upgrade after 48 hours, previously published GPSR blocks, Product Media alt texts, and Accessibility Statements remain permanently active.