Unemployment benefit in Luxembourg vs Germany.  

Are you really sure that you will receive benefits from Luxembourg?

If you are a EU-Citizen, you will receive unimployment benefits in Germany when you are a german residen. No doubt, the benefits in Luxemburg would be way higher ( sth. like 80 % of your last salary if I am not mistaken) whereas in Germany unimployment benefit ( normally 60-65%)is capped at around 1700 EUR per month..... If I am am well informed the 3-months rule applies to those who live in Luxemburg when they lose their job and want to move back to Germany. Nevertheless, when you are afraid of loosing your job I would not recomment a fake adress in Luxemburg or switch residence in a hurry, as this would lead you in serious trouble in Luxemburg. I hope this helps

It's paying to move to L; you have to live there for 6 months before you acquire any unemployment indemnities

I work 13 months in Luxembourg and live 12 months in Germany.

Even if you've never paid taxes in Germany, you benefit from the unemployment system, granted that you have lived there for some time. A year should be OK. Don't count on help from the employment agency, though, if you lose a job, you're much quicker in finding one yourself...