Save €40 off your next Lufthansa flight by requesting a free voucher through this link.
This deal has been around a couple weeks, but many countries, including Germany, returned error messages stating that the supply of vouchers had been exhausted. Lufthansa recently replenished the vouchers available for each country and you can now claim one (per e-mail address) at the link above.
Just specify the country you will departing from and you will receive a voucher code in you inbox that is only good for travel originating from that pre-specified country (the voucher amount will be in that country’s currency). Book by 01 May for travel through 01 August.
Don’t get your hopes up for big savings, though. The voucher only applies to the base fare, not to taxes and fees (including airport surcharge). I just booked a weekend trip to London tonight for €90 a/i with a base fare of only €6. Lufthansa charges a €10-15 booking fee, depending on the ticket, so I just booked my ticket with expedia.de.