Hi,

The Odoo Sales application provides customers with the ability to confirm orders, via an online signature, directly on the sales order. Once the sales order is electronically signed by the customer, the salesperson attached to the sales order is instantly notified that the order is confirmed.

Refer to the following.

-https://www.cybrosys.com/blog/managing-online-signature-and-payment-with-odoo-17

-https://www.cybrosys.com/blog/how-to-request-an-online-signature-to-confirm-orders-in-odoo-16

- https://www.odoo.com/documentation/18.0/applications/sales/sales/sales_quotations/get_signature_to_validate.html#:~:text=The%20Odoo%20Sales%20application%20provides,that%20the%20order%20is%20confirmed.

- https://www.youtube.com/watch?v=dGe7HrivSU8

Hope it helps