​@ACOU 

If you send many envelopes via DocuSign with exactly the same subject, Gmail groups messages into one “Conversation”.  That is a feature of Gmail.  You’ll need to add something unique to the subject line, so they don’t ‘look’ like part of the same conversation or change the setting in Gmail.

​@JohnSantos could you please read again my question please, i already know the behavior and how to avoid it, but i want you to explain how i do it

​@ACOU 

Got it. These are high-level steps.  I found this reddit discussion on the same topic. https://www.reddit.com/r/GMail/comments/ce2c1l/emails_with_the_same_subject_get_grouped_together

1. In your PHP “send envelope” logic, generate a unique subject string.
2. Pass that into your envelope creation.
3. If you use a Brand / Email Resource File for the envelope completion email and other notifier emails, make sure the subject node includes [[Data:SubjectInput]]. That way the uniqueness propagates.  

Shouldn't be on signer and not on envelope?

Hello ​@ACOU ,

You can  customize the email subject line for DocuSign envelopes to include a unique element. The best elements to use are those that are automatically generated for each document or transaction.

Here are a few ways to achieve this:

1. Use the Envelope ID: The Envelope ID is a unique identifier assigned to every document package (or "envelope") sent through DocuSign. This is the most effective method as it guarantees a unique subject for every sending request.

Subject Line Example: **{Original Subject} - Envelope ID: [Envelope ID]**

2. Use a Sequential Number or Timestamp: If the Envelope ID is not an option for some reason, you could append a continuously increasing number or a timestamp (like the current date and time down to the second) to the subject.

Subject Line Example: **{Original Subject} - Request #[Sequential Number]**

Subject Line Example: **{Original Subject} - [Date and Time]**

How to Implement in DocuSign

you generally customize the subject line when you create and send an envelope or by configuring an account-wide or template setting.

Template Customization: If you use a template, you can often define a dynamic subject line that pulls in a unique field like the Envelope ID or other custom fields.

Sending Customization: When you initiate the "Send" process for a document, look for the field where you enter the Email Subject. Ensure you add the unique element there.

Thanks and regards,
Mahmoud

I need an unique subject by recipient (not by envelope)