Questão jurídica principal
Whether the cantonal court arbitrarily found that the repaired tractor had been delivered, making the contract price due.
Decisão extraída
No arbitrariness was shown; the court could infer delivery from the invoice and the procedural record.
Fundamentação extraída
An invoice may constitute tacit notice of completion and delivery of the work. If the employer alleges non-delivery, it must raise the defence of non-performance in due time and under the cantonal procedural rules. The appellant failed to show a timely procedural objection or a constitutional violation in the handling of that defence.