After my form.Form validates the user input values I pass them to a separate (external) process for further processing. This external process can potentially fi
form.Form
You can add additional error details to the form's _errors attribute directly:
_errors
https://docs.djangoproject.com/en/1.5/ref/forms/validation/#described-later https://docs.djangoproject.com/en/1.6/ref/forms/validation/#modifying-field-errors