Firstly, you can’t have required=False on a BooleanField, use NullBooleanField instead:

• https://docs.djangoproject.com/en/dev/ref/models/fields/#booleanfield
• https://docs.djangoproject.com/en/dev/ref/models/fields/#django.db.models.NullBooleanField

let me know what the HTML output of the new widget is once you’ve done this?

EDIT

I assumed that this is a ModelForm. Is this a regular django.forms.Form?

EDIT 2

My test form:

from django import forms

class MyForm(forms.Form) :
    """The test form"""
    my_boolean_field = forms.BooleanField(initial=True)

My template:

<div>
{{ form.my_boolean_field.label_tag }}
{{ form.my_boolean_field }}
{{ form.my_boolean_field.errors }}
</div>

This is what I get for output when I view page source. EDITED

<div>
<label for="id_my_boolean_field">My boolean field</label>
<input type="checkbox" name="my_boolean_field" id="id_my_boolean_field" />
</div>

My View NEW

form = MyForm(initial={'my_boolean_field':False})

What you are showing and what I’m seeing aren’t matching up. paste your full form, view and template please?

EDIT 3

I only see output like this:

<div>
<label for="id_my_boolean_field">My boolean field</label>
<input checked="checked" type="checkbox" name="my_boolean_field" value="False" id="id_my_boolean_field" />
</div>

when I put False in quotes:

form = FormLogin(initial={'my_boolean_field':"False"})