How to Uninstall the Old OnePay App from Your Shopify Store (Step-by-Step)

If you’re migrating to a new OnePay integration or simply removing the old app, follow this clean, comprehensive process. It ensures your checkout won’t break, stray code won’t slow your theme, and billing stops on time.

TL;DR (Quick Checklist)

• Pause OnePay as a payment method: Settings → Payments → OnePay → Deactivate
• Remove the app: Settings → Apps and sales channels → Uninstall
• Clean theme code: Online Store → Themes → Edit code (search and remove “onepay” snippets/scripts)
• Turn off app embeds/blocks: Themes → Customize → App embeds/Sections
• Clear scripts & pixels: Settings → Customer events (remove OnePay scripts if any)
• Export data you need (payouts, settlements, mapping): from your OnePay dashboard (if applicable)
• Verify checkout & speed; publish theme

Before You Start

• Access level: You’ll need Shopify admin access with permission to manage apps and theme code.
• Downtime plan: Deactivating a payment method affects new orders immediately—do this during a low-traffic window.
• Backup: Duplicate your live theme: Online Store → Themes → … → Duplicate.
• Data export (recommended): From the OnePay dashboard, export any settlement reports, reconciliation files, or mappings you’ll need for accounting and support.

Step 1 — Deactivate OnePay as a Payment Method

1. In Shopify Admin, go to Settings → Payments.