I have been facing this issue in production API, when the user receives the document to sign and when he opens the link it redirects to ID Check. Please refer the attached screenshot.
In my C# I haven't enabled any authentication method.
Signer signer = new Signer();
signer.Email = recipientEmail;
signer.Name = recipientName;
signer.RecipientId = "1";
signer.RoutingOrder = "1";
signer.Tabs = new Tabs();
signer.Tabs.SignHereTabs = new List<SignHere>();
SignHere signHere = new SignHere();
signHere.DocumentId = "1";
signHere.PageNumber = "1";
signHere.RecipientId = "1";
signHere.XPosition = "110";
signHere.YPosition = "665";
signer.Tabs.SignHereTabs.Add(signHere);
envDef.Recipients = new Recipients();
envDef.Recipients.Signers = new List<Signer>();
envDef.Recipients.Signers.Add(signer);
envDef.Status = "sent";
EnvelopesApi envelopesApi = new EnvelopesApi();
EnvelopeSummary envelopeSummary=envelopesApi.CreateEnvelope(accountId, envDef);
This is all of my code. Please assist
ID Check screen