Short answer. Possibly, if you count as a third person to the deceased's support obligation. The Civil Code lets someone who paid funeral expenses claim reimbursement from the relatives who were legally obliged to support the deceased, but only if those relatives did not know about the payment at the time.
What the law says
When funeral expenses are borne by a third person, without the knowledge of those relatives who were obliged to give support to the deceased, said relatives shall reimburse the third person, should the latter claim reimbursement.
Civil Code, Article 2165 — Funeral Expenses Paid by a Stranger. Read the full provision →
Who this article is written for
Article 2165 addresses funeral expenses borne by a third person, reimbursed by relatives who were obliged to give support to the deceased. The article distinguishes between the person who paid and the relatives who owed a support obligation to the deceased while alive. If you are the one who paid, whether you fit the article's "third person" or fall among the relatives who owed support depends on your specific relationship to the deceased, which the article itself does not spell out.
The knowledge condition is central
Reimbursement under this article is conditioned on the payment being made without the knowledge of those relatives who were obliged to give support. If the obliged relatives knew about the funeral expense at the time it was incurred, the article's specific reimbursement mechanism, as written, is not what applies. The lack of knowledge is not incidental — it is built into the rule as a requirement for the relatives' reimbursement duty to arise.
You still have to claim it
The article's final words matter too: the relatives shall reimburse the third person should the latter claim reimbursement. Reimbursement is not automatic simply because the conditions are met — it depends on the person who paid actually making the claim. Nothing in this article suggests the relatives are expected to offer reimbursement on their own initiative without being asked.
What this article does not settle
Article 2165 does not itself define who counts as a relative obliged to give support to a deceased person, nor does it address a situation where the person who paid is themselves one of those obliged relatives rather than an outside third person. If your own relationship to the deceased carried a support obligation, this article's third-person framework may not describe your situation the same way, and that is a question this text alone does not resolve. Nor does the article say how the reimbursement amount is calculated, or whether it must match the exact sum spent.