Key legal question
Which liability regime applies to a Valais notary's omitted filing of deeds for land-register registration?
Extracted holding
The notary's ministerial activity is governed by cantonal public law under Art. 19 aLN/VS, with Arts. 41 ss CO applying only subsidiarily as cantonal supplementary law, not contractual liability.
Extracted reasoning
The canton of Valais validly used the reservation in Art. 61(1) CO. The omission concerned a ministerial act, so the contractual mandate rules and the 10-year limitation period of Art. 127 CO did not apply.