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Why overselling can happen with Shopify Buy Button (and how to prevent it)

If you're using Shopify’s Buy Button or external checkout methods, your event tickets may bypass seat selection. This can lead to overselling. Here’s why it happens and how to fix it.

Updated over 2 weeks ago

If you're using Shopify’s Buy Button or external checkout methods, your event tickets may bypass seat selection. This can lead to overselling. Here’s why it happens and how to fix it.

https://help.shopify.com/en/manual/online-sales-channels/buy-button


Content

🚨 Problem: Tickets overselling or seats not being assigned

If you're noticing:

  • Tickets being sold without seats

  • More tickets sold than available seats

  • Missing seat assignments

This may be caused by using external checkout methods like the Shopify Buy Button


🧠 Why this happens

The Buy Button allows customers to purchase products from:

  • Blogs

  • External websites

  • Landing pages

However, this checkout flow:

  • Does not support seat selection steps

  • Skips required ticket configuration logic

  • Completes checkout without assigning seats


⚠️ Impact

This can lead to:

  • Overselling tickets

  • Missing attendee seat assignments

  • Inventory mismatches


❌ Not supported for seat-based events

The following flows are not fully compatible with seat selection:

  • Buy Button

  • External embedded checkout

  • Accelerated checkouts (in some cases)


✅ Recommended setup

To prevent overselling:

  • Always direct customers to your Shopify product page

  • Ensure the seat selector is used before checkout

  • Avoid external checkout flows for events with assigned seating

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