Questão jurídica principal
Whether the signed email created a suretyship rather than a cumulative debt assumption
Decisão extraída
The wording and circumstances supported a cumulative debt assumption, not a suretyship.
Fundamentação extraída
The promise of personal liability for the promised sums pointed to an independent obligation; no intent to secure another's solvency was shown, and the business context and wording weighed against the formal requirements of suretyship.