Hi, I would like to display participiant's id in my survey, can I do that? If so, can anyone help me? Thanks.

If you mean the response ID, you can use the {SAVEDID} placeholder any time after the first question page has been submitted.

No, I want the participiant's ID from the survey participant list, because it recorded the number of entry have completed this survey, and I want my participiants to know how many people have already done this survey. Can you please help? Thanks.

That means, this ID is created by you???
So you can duplicate it as a TOKEN_ATTRIBUTE and display it.
Regards
Joffm

Not the token attribute that was created by me. It ia actually the PARTICIPIANT ID that is recorded in the Central participant database.

So the participant ID records the number of respondents who completed the survey before?
How do you do that?
Sounds very interesting, because there were some questions here about this.

Regards
Joffm

There is no way that the participant ID can be used to record the number of previous complete submissions.

What if a participant is registered but does not complete (or even start) the survey?

I hope I didn't confuse your guys.  What I wanted to display in the survey is the Participant's Id, regardless whether our participant has completed the survey or not (please see the screen capture attached). The survey gives an id for each participant who registered by email through public registration. Is there any placeholder that represents the Participant's id? Please help! Many thanks.

In theory : TOKEN:PARTICIPANT_ID must work, except actual system disable it due to the underscore …

No way to have it without PHP code

See framagit.org/SondagesPro/addVarToTokenEmail for idea