Hey @LeoNijs, thank you for posting in our Community!
This can be tricky, but you can use conditional tokens in HubSpot email templates to check if a certain field was updated and include a corresponding message. For example, {{if contact.iban_changed}}We have updated your IBAN number.{{/if}}. Alternatively, create a custom property in HubSpot that updates whenever key fields change and include this summary in the email. You can also set up a workflow in HubSpot that triggers any key field change, compiles a list of changed fields, and sends a notification email.
To our top experts @TomM2 and @danmoyle do you have any other recommendations for @LeoNijs?
Thank you,
Pam