Question juridique clé
Whether X. had standing to file a complaint against the seizure/procedure involving another creditor's participation.
Solution extraite
Yes. As a participating creditor in the same seizure series, he had a current, concrete, pecuniary interest in excluding another creditor from the series.
Motifs extraits
Under Art. 110 LP, creditors in the same seizure series share the consequences of changes to the seizure; therefore each has a legally protected interest in challenging another participant's validity.