I recently switched from one to another Databricks partner company and encountered a subtle problem: my new Partner Academy account was empty, but my certificates, badges, and training history remained registered to the existing company.
But you don't need to apply or retake anything. You can transfer your history and credentials to the new corporate account through Databricks' training support.
This is also important for the new partner company: all your certificates should be registered to them.
I've described the entire process and key details here: https://medium.com/databrickscommunity/how-to-transfer-databricks-certificates-and-badges-when-chang...