Customizing the Guest Registration After Checkout

The registration form on the checkout completion uses the "register" user form mode.
It can be customized from admin/config/people/accounts/form-display (you have a checkbox a the bottom that allows customizing the register form mode specifically if needed).

As for theming the user registration form, this is more like a general Drupal core support request. In general support requests aren't answered from this queue:

With the abundance of support available in Drupal Answers, the Drupal focused Stack Exchange site, we are no longer answering support requests in the issue queue.

Support requests opened here will be closed (won't fix), so please search for existing answers or post new questions at:

https://drupal.stackexchange.com (using the drupal-commerce tag)

Hi @jsacksick

My default registration form includes the email address field (as shown in the attached screenshot). However, I don't see this field in the guest registration form after checkout.

Upon examining the checkout module code, I noticed that commerce_checkout_completion_register is used instead of user_register_form. What am I missing here?

This is what I see after customizing my register form mode... I added a random text field and it shows up...

You're right it did add that new field when I added there. But again my main problem is my the default registration form there is an email address field and I dont see that field.

Automatically closed - issue fixed for 2 weeks with no activity.