Breaches of obligation can be categorized into involuntary and voluntary breaches
Involuntary breaches are caused by fortuitous events and force majeure
Voluntary breaches arise from the will of the parties and include delay or mora, dolo or fraud, culpa or negligence, and contravention of the tenor of the obligation
Those guilty of fraud, negligence, or delay in the performance of obligations, and those who contravene the tenor of the obligation, are liable for damages (Art. 1170)
In reciprocal obligations, neither party incurs in delay if the other does not comply or is not ready to comply in a proper manner with what is incumbent upon him
Default, Delay, or Mora (Art. 1169) is the failure to perform an obligation on time, constituting a breach of the obligation
Mora solvendi is a delay in the fulfillment of an obligation due to a cause imputable to the debtor
Requisites for mora solvendi include demandability and liquidation of the obligation, non-performance within the agreed period, and demand by the creditor
Effects of mora solvendi include the debtor being liable for damages and bearing the risk of loss for determinate objects
Mora accipiendi is a delay on the part of the creditor to accept the performance of the obligation
Effects of mora accipiendi include reduced responsibility of the debtor, exemption from risk of loss for the debtor, and liability of the creditor for damages
Requisites for mora accipiendi include the debtor offering performance, compliance with the prestation, and unjust refusal by the creditor
When demand is not necessary for delay to exist:
When the obligation or the law expressly declares so
When from the nature and circumstances of the obligation, demand would be useless
When the obligor has rendered it beyond his power to perform
Compensatio Morae is a delay on both parties in reciprocal obligations
Effects of compensatio morae include canceling the delay of the obligor and oblige, and equitable tempering of liability by the courts
Responsibility arising from fraud is demandable in all obligations, and any waiver of an action for future fraud is void (Art. 1171)
Fraud (Dolo) is the deliberate or intentional evasion of the normal fulfillment of an obligation, distinguished from negligence by deliberate intent
Dolo results in the nonfulfillment or breach of the obligation, while negligence lacks deliberate intent
Civil fraud includes Dolo Incidente and Dolo Causante, with different characteristics and purposes
Dolo Incidente is present during the performance of a preexisting obligation, while Dolo Causante is present at the time of the birth of the obligation
Fraud results in the evasion of normal fulfillment, while negligence results from inattention or lack of diligence
Intent to cause damage or injury constitutes dolo, while abandonment or carelessness constitutes culpa
Nonfulfillment or breach of obligation that is the reason for the other party entering into the contract results in the vitiation of consent
Results in the obligee's right to recover damages from the obligor
Results in the innocent party's right to ask for the annulment of the contract
Responsibility arising from fraud is demandable in all obligations
Any waiver of an action for future fraud is void
Waiver made in advance or in anticipation of fraud is void
Waiver for a past fraud is valid and can be deemed an act of generosity
Responsibility arising from negligence in the performance of obligations is demandable
Negligence is determined by whether the defendant used reasonable care and caution in the same situation
Negligence showing bad faith is tantamount to fraud
The fault or negligence of the obligor consists of the omission of diligence required by the nature of the obligation
When negligence shows bad faith, the provisions of articles 1171 and 2201, paragraph 2, shall apply
Gross negligence is characterized by the absence of care or diligence, acting or omitting to act willfully and intentionally
Fraud is distinguished from negligence by deliberate intention to cause damage, while negligence lacks such intention
Liability for fraud cannot be mitigated by the courts, while liability for negligence may be reduced according to circumstances
Culpa Contractual is the fault or negligence of the obligor in the performance of a pre-existing contract
Culpa Aquiliana is the fault or negligence causing damage to another person
Art. 1173 of the Civil Code applies to both Culpa Contractual and Culpa Aquiliana