Hi Adamu,

I had the same request from our client and answer from Cybrosys  was not working - here is my code modified (working on v15):

< template id="report_delivery_document_inherit_custom_module" inherit_id="stock.report_delivery_document">
        < xpath expr="//div[@name='signature']" position="after">
            < p t-esc="o.sale_id.note"/>
        < /xpath>
< /template>

Hi,
You can add note in delivery slip by inheriting the delivery slip template like below.

< template id="report_delivery_document_inherit_custom_module" inherit_id="stock.report_delivery_document">
        < xpath expr="//div[@name='signature']" position="after">
            < p t-field="o.note"/>
        < /xpath>
    < /template>

Regards