Last updated: July 15, 2020
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The form GUID (Globally Unique Identifier) is a 128-bit integer number used for identification. The GUID is required when using HubSpot's Forms API, and can also help you identify a HubSpot form embedded on an external page.
the formID attribute value in the embed code, which is the form GUID.The form GUID also appears in the page URL when you're in the form editor.