Please help us help you and fill where relevant:
LimeSurvey version: [see right hand bottom of your LimeSurvey admin screen]
Own server or LimeSurvey Cloud: my server 6.14
Survey theme/template: twnty -three
==================Hello,I need help for a hotel project.What I have:

• One registration form (public).
  Guest gives: name, email, departure date.
• Two other surveys:
  1. Complaint survey
  2. Satisfaction survey

What I want:

• When a guest registers, he receives one email with two links (one for each survey).
• The two surveys must work with the same token (the one created during registration).
• The surveys must be active at different times:
  • Complaint survey:
    • Active from check-in until departure + 30 minutes.
  • Satisfaction survey:
    • Active only 1 day before departure until departure + 30 minutes.

Questions:

1. Can LimeSurvey do this automatically when I use "Allow public registration"?
2. If not, what is the easiest way?
   • Use Central Participant Database (CPDB)?
   • Use a script + API?
   • Use a plugin?
3. Has anyone done this before? Any advice?

Thank you for your help.

I find your timings too rigid.

I might want to complain after I left. Or I might want to respond the satisfation survey a couple of days after I have left. Why only until 30min after departure?

To be able to do this you most probably will have to use the API with custom scripts.

E.g. once the person registers you trigger the creation of the other two surveys based on the arrival and departure dates in the first survey.

However, what happens if the person adds a couple of days while they are already there? Or if they shorten their stay? You would need to cater for this too somehow.

The Limesurvey part is easy. But you will need to create your own script to handle all the timings, etc.