How to generate the checkout link for existing Customer

I have given the Buyer’s email address of the existing Customer, and I have entered the Order details with the Customer Id of the existing Customer whereas Customer Id is optional. I have generated the Checkout link with these details and placed the order.

Actual Output:
A new Customer is created with the buyer’s email address and Payment linked to the newly created Customer.

Expected OutPut:
Payment should be linked to the existing Customer (As I have passed the Customer Id in request).

How can I achieve this?

Thanks in advance!

With the Checkout API at this time a new customer profile will be created when payment is processed even if you add a customer_id to the order of the checkout. We’re constantly working to improve our features based on feedback like this, so I’ll be sure to share your request to the API product team. :slightly_smiling_face:

Thank you Bryan!

When can we expect that feature to be live?

Currently, we don’t have a public roadmaps for feature releases and new products.