---
title: "❓ Guest list upload FAQ"
url: "https://help.checkinpax.com/en/article/faq-common-questions-about-guest-list-uploading"
language: "en"
last_updated: "2026-04-15T08:14:53.033Z"
---

# ❓ Guest list upload FAQ

Common questions about guest list uploading

### What happens when I upload a list into a guest list that already has guests in it?

Your new guests will be added on top of the existing ones. Check-in Pax never automatically deletes or replaces your guest data. If you want to replace guests, delete the existing guests or the guest list before uploading.

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### Can I automatically upload guests from one Excel file into multiple guest lists?

No. One Excel file uploads into one guest list at a time.

However, you can upload all guests into one list first, then search and move relevant guests into their dedicated lists afterward.

* * *

### How many guests can I upload?

You can upload hundreds to several thousand guests. Check-in Pax is optimized for invitation-only events with **up to 5,000 guests**.

If you plan to use it for a larger database, contact us so we can discuss potential limitations or best practices.

* * *

### How many custom fields can I create?

You can create **up to 15 custom fields**. You can also reuse existing fields or rename them if needed.

**Best practice:** Always use default fields where possible instead of creating new fields for data that already exists.

| Instead of creating... | Use this default field |
| --- | --- |
| A new field called "Surname" | Rename "Last Name" to "Surname" |
| A new field called "Contact Email address" | Use the existing "Email" field |

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### Can I re-upload an Excel or CSV file to update existing guests?

**No.** Excel or CSV re-upload does **not** update existing guests.

If you need to correct guest data after upload, you have two options:

| Option | How to do it |
| --- | --- |
| **Edit manually** | Go to the guest list and edit each guest individually |
| **Delete and re-upload** | Delete the affected guests first, then upload a corrected Excel or CSV file |

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## Related Articles

-   Uploading guests
-   Creating guest lists
-   Customizing data fields
-   Adding, editing, and deleting guests