rma/crm_rma_stock_location/views/stock_picking.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <!-- INHERITED VIEW FOR THE OBJECT : stock_picking -->
    <record id="picking_in_form" model="ir.ui.view">
        <field name="name">crm_claim_rma.picking_in_form</field>
        <field name="model">stock.picking</field>
        <field name="inherit_id" ref="stock.view_picking_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='state']" position="before">
                    <button name="%(action_stock_picking_from_claim_picking)d"
                            string="Product to stock" type="action"
                            attrs="{'invisible':['|',
                                                ('state','&lt;&gt;','done'),
                                                ('claim_id', '=', False)]}"/>
                    <button name="%(action_loss_picking_from_claim_picking)d"
                            string="Product to Loss" type="action"
                            attrs="{'invisible':['|',
                                                ('state','&lt;&gt;','done'),
                                                ('claim_id', '=', False)]}"/>
                    <button name="%(action_used_picking_from_claim_picking)d"
                            string="Product to refurbish stock" type="action"
                            attrs="{'invisible':['|',
                                                ('state','&lt;&gt;','done'),
                                                ('claim_id', '=', False)]}"/>
            </xpath>
        </field>
    </record>
</odoo>