Embedded signing

Embedded signing is a way to put the e-signature experience directly inside your own website, portal or app, so signers never leave your product to sign. Also known as in-app signing or embedded e-signature, it contrasts with the standard remote flow, where the signer receives an email and signs on the provider's page.

Technically, your application calls the e-signature provider's API to create a document and request a short-lived signing URL for a specific person. You then load that URL inside your interface, often in an iframe or a web view, and the signer completes the document there. When they finish, the provider notifies your app, usually through a webhook, and you continue the user's journey.

Think of a property management portal. A new tenant logs in, reviews the lease on the same screen as their move-in checklist, and signs without an email round-trip. Or a SaaS company that wants customers to accept an order form during checkout. In both cases, the business already knows who the user is because they are logged in.

A misconception is that embedded signing is less secure or less valid than email-based signing. Validity rests on the same elements, and the audit trail still records the event. The difference is that identity is often vouched for by your own login system, so your authentication becomes part of the evidence.

Embedded signing depends on an API and typically works alongside templates, so the app can generate the right document for each user automatically.

Planning an embedded flow means thinking about a few details up front: how signing URLs expire and are regenerated, what the page should show after a signer finishes or declines, how the flow behaves on a small phone screen, and how your app stores the final PDF and certificate. Testing on mobile early is especially important, because a cramped iframe is where most embedded experiences fall apart. Also plan what happens if the signer closes the tab halfway through.

Our take: embedded signing is worth the engineering effort when signing is a step inside a product flow people already use. For most small businesses sending contracts to clients, a clean email-based flow with no signer account required is simpler and just as effective.

Embedded signing is on the eSignSimple roadmap, along with our API. Today signers get a unique link by email, sign in the browser without creating an account, and every document comes with an audit trail, a certificate of completion and public hash verification.