Alright, I consider this short answer that generally there is a solution. I just do something in the wrong way.

I consulted this part of the documentary but failed. Here is what I did:
I created a discount with the tzpe Fixed per seat and the value 30.
I have an event with the RSVP settings for Auto-approve registration upon payment and the prica of 30 Euro. I chosed the Discount to apply and integrate #_Discount in the Registration Form Format. When I fill in the form and enter the coupon value in the discount field, I reach the Booking recorded html Format where I get the order to pay and the buttons for the offered services.

Should there be any sign or advice that a coupon is valid or wrong? In the dashboard’s Change registration list, there is no value in the discount field of that registration.

Great that worked, thank you. But some more questions and remarks.

1. Can I and how could I take influence which Booking recorded html Format will be shown depending of a discount code?
2. It looks like the Registration Paid Email will not be send if there is no payment because of the discount, right? What would be a solution to send everybody the same email after the booking independently from paying or using discount?
3. Where can I see which person use which discount code? If I look in a specific registration the discount field is still empty, the others are filled.

Any direct instruction but also link to part of documentary or FAQ or forum will be appreciated.

Great, great, your questions and explainations bring me closer and easier to where I want to go. I understand more and more the awesome capacity and abilities of your plugin, there are just so many places to configure and enter something and several ways to realize the goal.

3. I put #_APPLIEDDISCOUNTNAMES in the Contact Person Email Format, so the code a user entered should be visible like this, right?
And 1. and 2. go along together now. I like to give a special info after a valid registration. Preferable by mail but could also be a message on the side. And a valid registration means after payment or after using a disount code that reduces the price to 0 so there will be no payment. When I give this info always after booking it is also visible for people who booked but haven’t payed yet.

Ok, I checked their description again but don’t see the solution yet.

The situation I created is like that:
Case 1: You fill in the form, you do the paypal payment, you receive the mail with the special info.
Case 2: You fill in the form, you enter a discount code that sets the price to 0. So there is no payment and no mail. Because of auto-approval there is no pending, update or paid mail. And also there is no setting to show a message after sending the form with full discount. Am I right?

I tried now with activating Require approval for registration and Auto-approve registration upon payment and chosed to put the info into Registration Updated Email Format, but there is no mail coming after register with full discount.

Oh, damn. I just figured out that my last reply wasn’t send.

It looks like we will solve the issue in a different way but what I tried and find out last time was first that the correct word is paid not payed 😀
Then I looked into [eme_if] and experimented a bit in the Booking recorded html Format without success.

I discovered that in some of your exemples you are using ‘ and in others “. I guess it makes no difference?
I tried [eme_if tag='#_IS_PAYED' value='1']/[eme_if tag='#_IS_PAID' value='1'] and [eme_if tag='#ESC_TOTALPRICE' value='0'] and [eme_if tag='#ESC_APPLIEDDISCOUNTNAMES' value='yourcode'] but couldn’t remarque any reaction at that point of the process.