</page>
<page string="Billing" groups="account.group_account_invoice">
<field colspan="4" name="partner_id" on_change="onchange_partner_id(partner_id)" select="1" string="Customer"/>
- <field domain="[('partner_id','=',partner_id)]" name="contact_id" string="Contact Address"/>
<field name="warn_customer"/>
<field name="currency_id" select="1" groups="base.group_multi_company" required="1"/>
<newline/>