Countersigning and multiple signers

Add signers in the order they should sign; each gets their link when the previous signature lands. Countersign yourself last and the document completes automatically.

Everyone gets the final PDF the moment the last signature is in.

Sequencing prevents the awkward half-signed state — the second signer always sees a paper the first has already committed to. Typical order for a contract: client first, you countersign last, so nothing goes fully binding until you have seen their signature land.