vertical-cooperative/easy_my_coop_fr/models/coop.py

from odoo import fields, models


class SubscriptionRequest(models.Model):
    _inherit = 'subscription.request'

    company_type = fields.Selection(selection_add=[
                            ('asso', 'Association'),
                            ('eurl', 'EURL / Entreprise individuelle'),
                            ('sarl', 'SARL'),
                            ('sa', 'SA / SAS')
                            ])

    def get_required_field(self):
        req_fields = super(SubscriptionRequest, self).get_required_field()
        if 'iban' in req_fields:
            req_fields.remove('iban')

        return req_fields