How MergeGuard Protects Your Store — From Day 1, Forever

Connect Your Shopify Store

Install MergeGuard from the Shopify App Store and connect with one click. MergeGuard immediately begins reading your customer database.

• No coding required
• Works with all Shopify plans
• No impact on checkout or payments
• Installs in under 60 seconds

Clean Your History

Run your first scan to find all existing duplicates in your customer database. Review by confidence level, approve, and merge in bulk. An Excel export is saved before any merge for safety.

• Email address variations matched automatically
• Phone number normalization across formats
• Name + address similarity matching
• Bulk merge by confidence level
• Excel export before every merge (safety backup)

Layer 1 LIVE: Signup Protection

Every new customer signup is cross-checked in real time. If a duplicate is detected, it is prevented before it enters your store.

• Checks every new account creation in real time
• Matches by email, phone, name, and address
• Duplicate stopped before it enters your database
• No manual action needed — runs automatically
• Zero impact on checkout speed

This protection is active 24/7. You never need to run it manually.

Layer 2 LIVE: Checkout Protection

At every checkout — including guest checkout — MergeGuard checks again. Discount abuse blocked. Both layers run independently, all the time.

• Checks every checkout event — including guests
• Catches discount abuse from duplicate profiles
• Links guest orders to known customer profiles
• Prevents POS-created duplicate accounts
• Runs automatically on every transaction

Two layers. Both automatic. Neither ever turns off.

Auto-Merge: Background Cleanup

Enable Auto-Merge and any new high-confidence duplicates are automatically merged in the background. Running 24/7, no manual review needed.

• Auto-merge for high-confidence matches only
• Custom merge priority rules (email, mobile, or both)
• Full audit log of every auto-merge action
• Excel export available for any auto-merge batch
• Pause or adjust rules any time from the dashboard