How Is Financial Contribution Proven in Adulterous Relationships?
Introduction
When unmarried partners cannot legally marry each other, their cohabitation does not automatically create equal ownership over properties acquired during the relationship. A person claiming a share must generally prove an actual contribution of money, property, or industry to the acquisition of the property.
This rule commonly applies to adulterous, bigamous, and other relationships in which one or both parties are legally incapacitated to marry each other. The principal issue is not merely whether the parties lived together or whether the property was acquired during their relationship, but whether the claimant contributed to its acquisition.
Governing Law on Property Acquired During Adulterous Cohabitation
Article 148 of the Family Code governs property relations in cohabitation not covered by Article 147. It provides that only properties acquired through the parties’ actual joint contribution of money, property, or industry are owned in common, and ownership is proportional to the parties’ respective contributions. [Family Code of the Philippines (1987)](#L1.162)
The provision applies to relationships such as adulterous and bigamous unions, including situations in which one party is validly married to another. The Supreme Court has recognized that Article 148 governs relationships where the parties are not capacitated to marry each other. [Atienza v. De Castro (2006)](#J1.4)
Article 147, which provides a stronger presumption of equal ownership, applies only when the parties are capacitated to marry each other and live exclusively as husband and wife. It does not govern adulterous relationships involving a party who has a subsisting valid marriage. [Family Code of the Philippines (1987)](#L1.161); [Joaquino v. Reyes, et al. (2004)](#J3.11)
What Must Be Proved?
A claimant under Article 148 must establish two principal matters:
- The property was acquired during the parties’ cohabitation.
- The claimant made an actual contribution of money, property, or industry toward its acquisition.
The contribution must be connected to the acquisition of the property. Mere cohabitation, emotional support, household administration, or the fact that the claimant’s name appears in a document does not by itself establish ownership.
In Atienza v. De Castro, the Supreme Court held that proof of actual contribution is required and that co-ownership exists only to the extent of the proven contribution. If the parties’ actual contributions are established but their precise proportions cannot be determined, their respective shares may be presumed equal. [Atienza v. De Castro (2006)](#J1.4)
Meaning of Actual Financial Contribution
Actual financial contribution refers to a proven payment, investment, or transfer of money that helped acquire the property. The evidence should reasonably connect the claimant’s funds to the purchase price, down payment, installment payments, construction expenses, or another identifiable acquisition cost.
Examples may include:
- Bank transfers or deposit records showing payments to the seller;
- Receipts for a down payment or installment payments;
- Loan documents identifying the claimant as a borrower or co-borrower;
- Checks issued by the claimant for the property’s acquisition;
- Written acknowledgments by the other party admitting the claimant’s contribution; and
- Reliable testimony supported by independent documentary evidence.
Evidence that merely shows the claimant had income or financial capacity is not necessarily proof that the claimant contributed to the purchase of the property. The contribution must be shown as an actual contribution to the property or to its acquisition.
Industry as a Contribution
Article 148 recognizes not only money but also property and industry as possible contributions. Industry may include work or services that are directly shown to have contributed to the acquisition, preservation, or improvement of the property.
However, the claimant must still prove the nature and value of the alleged contribution. General assertions that the claimant managed the household, cared for the parties’ children, or supported the relationship may be insufficient where the claim is based on Article 148 and the parties were not legally capacitated to marry each other.
This differs from Article 147, where household care and maintenance may be treated as joint contribution when the parties are capacitated to marry each other. Article 148 requires proof of actual joint contribution before the presumption of equal shares can arise. [Family Code of the Philippines (1987)](#L1.162); [Valdes v. Regional Trial Court, et al. (1996)](#J11.4)
The Presumption of Equal Shares
Article 148 provides that, in the absence of proof to the contrary, the parties’ contributions and corresponding shares are presumed equal. This presumption does not arise automatically from cohabitation.
The claimant must first prove that an actual contribution was made. Only after actual contribution is established may the parties’ shares be presumed equal if the evidence does not show a different proportion.
In De Canada v. Baclot, et al., the Supreme Court explained that the absence of proof of the precise amount of each contribution does not necessarily defeat co-ownership when actual contribution itself has been established. However, if there is no proof of actual contribution at all, no co-ownership arises and the presumption of equal shares does not apply. [De Canada v. Baclot, et al. (2020)](#J4.8)
Burden of Proof
The party asserting co-ownership bears the burden of proving the factual basis of the claim. The claimant must present competent evidence showing both the property’s acquisition during the cohabitation and the claimant’s actual contribution.
In Lavadia v. Heirs of Luna, et al., the Supreme Court reiterated that a mere allegation of co-ownership is insufficient. The claimant must provide proof of actual contribution to the acquisition of the property. [Lavadia v. Heirs of Luna, et al. (2014)](#J2.18)
Similarly, Tumlos v. Fernandez, et al. confirms that cohabitation alone does not create co-ownership when the parties are not capacitated to marry each other. Proof of actual contribution remains necessary. [Tumlos v. Fernandez, et al. (2000)](#J10.14)
Does Property Registration Establish Ownership?
Registration in both names may be relevant evidence, but it is not always conclusive proof that both parties contributed financially. Under Article 148, the controlling inquiry remains whether the parties actually contributed money, property, or industry to the acquisition.
Conversely, registration in only one party’s name does not automatically defeat a properly supported claim of co-ownership. The claimant may still prove a beneficial interest through payment records, admissions, contracts, or other competent evidence.
In Ventura, Jr. v. Abuda, et al., the Supreme Court emphasized that the inclusion of a person’s name as a spouse or the registration of property in a particular manner does not, by itself, establish co-ownership absent proof of actual contribution. [Ventura, Jr. v. Abuda, et al. (2013)](#J5.9)
Effect When One Party Is Validly Married
When one party is validly married to another person, that party’s share in the co-ownership under Article 148 accrues to the absolute community or conjugal partnership existing in the valid marriage, as applicable.
Thus, the other partner in the adulterous relationship does not necessarily acquire the entire share attributable to the legally married party. The legally married party’s proven share may belong to the property regime of the valid marriage. [Family Code of the Philippines (1987)](#L1.162); [Joaquino v. Reyes, et al. (2004)](#J3.11)
Common Evidentiary Problems
Uncorroborated Testimony
Testimony that the claimant gave money may be considered, but unsupported assertions may be insufficient, particularly when the alleged payments were substantial or made many years earlier. Courts may assess whether the testimony is consistent with bank records, receipts, written agreements, tax documents, or testimony from independent witnesses.
Household Support
Payment of ordinary household expenses does not automatically establish a financial contribution to a specific property. The claimant should show that the payments were intended for, or actually applied to, the acquisition or improvement of the property.
Income or Employment Records
Employment records, salary slips, or proof of business income may establish the claimant’s capacity to contribute. They do not necessarily prove that the claimant actually contributed to the property. A connection between the income and the acquisition must still be shown.
Property Acquired Before Cohabitation
Article 148 concerns properties acquired during the relevant cohabitation and through actual joint contribution. A property acquired before the relationship generally cannot be claimed merely because the parties later lived together or because the claimant helped maintain it.
Illustrative Situations
Example 1: Proven down-payment contribution. A married person and an unmarried partner acquire land during their relationship. The unmarried partner presents bank records showing that she paid one-half of the down payment directly to the seller. If the payment is connected to the purchase, she may establish co-ownership to the extent recognized under Article 148.
Example 2: Income without proof of payment. The claimant shows that he was employed during the relationship but presents no evidence that his earnings were used to purchase the property. Employment records alone may not prove actual contribution.
Example 3: Written acknowledgment. The registered owner signs a document acknowledging that the other partner contributed one-half of the purchase price and is entitled to one-half of the property. Such an acknowledgment may strongly support the claim, subject to questions of authenticity, interpretation, and enforceability.
Example 4: No contribution shown. The parties lived together for several years, but the claimant cannot identify any payment, property transfer, or service connected with the acquisition. Cohabitation alone will generally not establish co-ownership under Article 148.
Practical Steps in Preparing a Claim
- Identify the governing property regime. Determine whether the parties were legally capacitated to marry each other or whether Article 148 applies because of a prior valid marriage or another legal impediment.
- Establish the acquisition date. Obtain the deed of sale, title documents, tax declarations, loan records, and payment history to determine when the property was acquired.
- Trace the claimant’s contribution. Collect bank statements, deposit slips, receipts, checks, electronic transfer records, loan documents, and written acknowledgments.
- Connect each payment to the property. Evidence should identify the seller, property, transaction date, account, or purpose of the payment whenever possible.
- Determine the legal consequence of the other party’s valid marriage. Assess whether the legally married party’s share belongs to an existing absolute community or conjugal partnership.
- Preserve original evidence. Keep original documents and obtain certified copies where appropriate. Electronic records should also be preserved with information showing their source and integrity.
Relationship Between Article 148 and Other Property Rules
Article 144 of the Civil Code formerly governed certain cohabitation arrangements. Its application was limited and did not cover adulterous relationships involving parties who were incapacitated to marry each other. Article 148 of the Family Code now expressly addresses limited co-ownership in such relationships. [Civil Code of the Philippines (1949)](#L2.146); [Mallilin, Jr. v. Castillo (2000)](#J9.10)
Article 147 remains relevant when the parties are capacitated to marry each other and live exclusively as husband and wife without marriage or under a void marriage. Under that provision, household care and maintenance may be treated as joint contribution, and properties acquired during cohabitation are generally presumed to have been obtained through joint efforts. [Family Code of the Philippines (1987)](#L1.161)
Conclusion
For adulterous relationships and other unions governed by Article 148, cohabitation does not by itself establish co-ownership. The claimant must prove an actual contribution of money, property, or industry to the acquisition of the property.
The presumption of equal shares applies only after actual contribution has been established. If the claimant cannot show a legally relevant contribution connected to the property, the claim for co-ownership may fail even when the parties lived together for many years or the claimant helped support the household.
The most reliable approach is to preserve documents that trace the claimant’s contribution to the property’s acquisition. Before filing a claim, the parties should also determine whether one party’s valid marriage affects the destination of that party’s share under the existing property regime.
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