Questão jurídica principal
Whether the seizure opposition court arbitrarily found that the creditor had not made the debtor's passive standing plausible.
Decisão extraída
Yes. The written undertaking of 28 July 1999 made it sufficiently plausible that the respondent had personally assumed the debt as a cumulative co-debtor.
Fundamentação extraída
The cantonal court's view that no document showed a personal obligation was untenable in light of the clear wording of the signed letter; its contrary inference from a supposed group-financing structure lacked support in the file and exceeded the limited review in seizure opposition.