Set Signers order

For some documents, you need to order the Signers: the Signer n needs to sign before the Signer n+1, and if Signer n doesn't sign then Signer n+1 can't sign.

If you have this need, you can choose the dedicated Signing Flow to order the signers. You have to set ordered_signers : true in the initiation of the Signature Request.
The order in which you added the Signers to the Signature Request will determine this signature order.

This page Signing flow gives you more details on how to order your signers.