Hi,

To include the client's name and the reference of each product sold on the receipt in the Odoo v16 Point of Sale (POS) module, you need to customize the receipt template by inheriting the OrderReceipt template. Below is an example of how you can achieve this:

<templates id="template" xml:space="preserve">
<t t-name="OrderReceipt" t-inherit="point_of_sale.OrderReceipt" t-inherit-mode="extension" owl="1">
<xpath expr="//t[@t-esc='receipt.cashier']/.." position="after">
            <t t-if="receipt.partner">
                <div>
Customer: <t t-esc="receipt.partner.name"/>
                </div>
            </t>
        </xpath>
    </t>
  </templates>

To include the product reference we need to inherit the OrderLineReceipt template.

  <t t-name="OrderLinesReceipt" t-inherit="point_of_sale.OrderLinesReceipt" t-inherit-mode="extension" owl="1"> <xpath expr="//t[@t-foreach='receipt.orderlines']" position="inside"> <t t-foreach="orderlines" t-as="orderline" t-key="orderline.id">

<div>

<t t-if="orderline.product.default_code">

<t t-esc="orderline.product.default_code"/>

                </t>

            </div>

       </t> </xpath> </t></t>

For more information about customizing pos Customer Receipts you can check this blogs:

Customize PoS Receipts in the Odoo 16

Customize Customer Receipts

Hope it helps