Hi Stephan,

Two main ways to leverage a Signing URL are:
(1)hit the link directly in a new browser window and use the Handover URL to proceed with your signing flow. Especially for the New Signer Experience, the handover URL button is more visually obvious and appears in a more intuitive way for the signer.

(2)embed the Signing Ceremony using different HTML tags: iframe, embed and object

But if your concern is to work around the third-party cookie issue when the cross-site tracking is disabled by browser, it's the same for all of these HTML embedding techniques. OneSpan Sign is working actively to provide a cookieless signing experience, and you have the option to set up a reverse proxy at your end to turn third-party cookies to the first-party.

Duo