Question juridique clé
Whether the federal appeal was admissible despite being filed incompletely and supplemented only after the appeal period expired.
Solution extraite
No; the first letter contained no conclusions or reasons, and the later supplement was filed after the non-extendable appeal deadline, so the appeal was manifestly inadmissible.
Motifs extraits
The appeal period is 30 days from notification and cannot be extended. The deadline started the day after receipt of the cantonal judgment and expired on 25 March 2009. A valid federal appeal requires conclusions and reasons; the 23 March letter did not satisfy these requirements, and the 4 April letter was late.