Why is update drop in component telling me 'A customer with that specified email already exists'

I am trying to create an easy way for customers to upgrade from unverified to verified. I’m using drop in components as specified here:

When I test the drop in component by entering information about the customer I am trying to upgrade the forms raises an error:

A customer with that specified email already exists

I’ve also checked the headers of the request being made. The url is


There’s no parameter for the customer id.

Hi @Robin_Gane-McCalla – it sounds like the customerId isn’t being passed to the drop-in component. Would you be able to check if the ID of the customer you trying to upgrade is being send to the component?