Submit Type is an add-on for the Stripe Checkout plugin that can be used to customize the type of the submit button that appears on the Stripe payment page. This allows you to show a different button text on a per product basis such as “Book”, “Donate” or “Pay”.
How Submit Type with Stripe Works
Stripe offers 4 different submit types to customize the text that appears on the payment page button – pay, book, donate and auto.
Submit Button Type Pay

Submit Button Type Book

Submit Button Type Donate

Submit Button Type Auto

How to Customize Stripe Submit Type (Option 1)
You can select one of the 4 options in the product interface of the Stripe Checkout plugin.

Once you have created a new product or edited an existing one with a Submit Type option selected, add the shortcode for it to a post/page.
[wp_stripe_checkout id="1"]
Replace the value of id with your product ID.
How to Customize Stripe Submit Type (Option 2)
If you are using the “wp_stripe_checkout_session” shortcode in the Stripe Checkout plugin, you can change it to the following to customize the submit type.
[wp_stripe_checkout_session name="My Product" price="2.99" submit_type="donate"]
Supported values are: book, donate, pay and auto. The default is auto.
How to Customize Stripe Submit Type (Option 3)
If you are using the “wp_stripe_checkout_v3” shortcode in the Stripe Checkout plugin, you can change it to the following to customize the submit type.
[wp_stripe_checkout_v3 price="price_UY9NozbEy7T3PUlk" submit_type="book"]
Supported values are: book, donate, pay and auto. The default is auto.
Get the Submit Type Add-on
Please contact us if you have any questions about the add-on.
What does the donate type do?
@Brian, When this is set, Stripe should classify the transaction as a donation.