In Tijuana, a loan between private individuals is legal if it is written down and provable, but the everyday use of the dollar, trips back and forth to San Diego and migrants in transit multiply the risks of cross-border disputes and loan scams.
A border city of around two million people
Tijuana, the largest city in Baja California, has around two million inhabitants and faces San Diego. Every day the San Ysidro and Otay Mesa border crossings see thousands of workers, students and binational families pass through in both directions.
Pesos or dollars: state the currency of the loan
Rents, cars and cross-border wages are often negotiated in dollars. Mexican monetary law in principle allows a dollar debt to be settled in Mexico with the peso equivalent at the day's rate, so the contract must set both currency and place of payment.
Maquiladoras and workers from the south
Assembly plants, especially for medical devices and electronics, employ tens of thousands of workers who often arrived from other states. Advances between colleagues and loans from a supervisor are common there, and a signed receipt protects both sides of the deal.
Cross-border commuters facing two tax administrations
A Tijuana resident working in San Diego may answer to both the SAT and the US IRS. Lending dollars earned in California means checking which returns are due. Our page on the peer-to-peer loan for cross-border workers covers this point.
Migrants and deportees, targets for loan sharks
As a transit city for migrants from Central America and elsewhere, and an arrival point for people deported from the United States, Tijuana sees informal lenders exploit their distress. Read our page on the peer-to-peer loan for immigrants before committing.
The Civil Code of Baja California
A loan between Tijuana residents is governed by the Civil Code of the State of Baja California, which regulates the mutuo, the Mexican loan contract. Naming the Tijuana courts as competent limits the risk of having to litigate on the other side of the border.
A pagaré written in Spanish and payable in Tijuana
A pagaré (Mexican promissory note) written in Spanish and payable in Tijuana allows action before Mexican judges if the borrower defaults. A note signed in San Diego in English follows other rules and will complicate debt recovery in Mexico.
Montadeudas: the warning carried by the local press
In 2022 the Tijuana press relayed the CONDUSEF warning about montadeudas apps, after hundreds of lending apps used for extortion were taken down. The method never changes: a tiny loan, outrageous interest, then threats sent to the borrower's contacts.
Fake Californian lenders and transfer fees
Some fraudsters pose as private lenders from San Diego or Los Angeles and demand international transfer fees before releasing the funds. No genuine lender asks for advance payment by gift card, cryptocurrency or money transfer service, whatever the excuse given.
Notaries, the property registry and the fideicomiso
A loan secured on a house in Playas de Tijuana goes through a notario público of Baja California, with entry in the public property registry. Foreign owners holding through a bank fideicomiso, compulsory near the border, must also consult their trustee.
Reporting a scam on both sides of the border
In Mexico, the victim files a denuncia with the Fiscalía General del Estado de Baja California and can contact the cyber police. If the fraudster operates from the United States, a report to the Federal Trade Commission or the FBI's IC3 completes the process.
The federal framework as applied in Tijuana
SAT reporting threshold, Ley Fintech, case law on usury: our guide to private loans in Mexico details these federal rules, which apply in Tijuana just as in Mexico City. CONDUSEF also receives the public at its Baja California offices.
Setting up a private loan in Tijuana
- Check the other party's identity with an INE voter card or a passport, as well as their real address in Tijuana or San Diego.
- Draft a mutuo contract in Spanish stating the currency, any exchange rate, the schedule and the Tijuana courts.
- Have a pagaré payable in Tijuana signed, fully completed and dated.
- Transfer the money by SPEI or a traceable international transfer, never handing over cash near the border crossing.
- Report loans received above the threshold to the SAT and check any IRS obligations with an adviser.
- Keep receipts, messages and statements for every repayment throughout the loan and beyond.
Costs and risks of a cross-border loan
| Item | Order of magnitude | Note |
|---|---|---|
| Agreed rate | Free, in pesos or dollars | A judge can reduce it if usurious |
| Peso-dollar conversion | Exchange bureau buy-sell spread | Fix the rate in the contract |
| Notary and registry (secured loan) | Baja California scale, in MXN | Indicative; get a written quote |
| International transfer | Bank fees in both countries | Keep the receipt |
| Fees to release the funds | Any amount | Scam: do not pay |
Documents to gather in Tijuana
- INE voter card, passport or residence card
- CURP and RFC, plus the US tax number if the lender is taxed in the United States
- Comprobante de domicilio (proof of address) in Tijuana
- Payslips from a maquiladora or a Californian employer
- Mutuo contract and pagaré in Spanish
- SPEI or international transfer statements
Pitfalls specific to the border
- Writing a contract without stating whether the debt is in pesos or dollars, then arguing over the exchange rate at repayment.
- Paying transfer fees to a San Diego lender met on Facebook Marketplace before receiving any money.
- Handing cash to a go-between near the San Ysidro crossing with no receipt or signed contract.
- Accepting, as a migrant passing through, a daily loan at an extreme rate secured by confiscation of identity papers.
- Installing a lending app that demands access to the phone's photo gallery and contacts.
Private loans in Tijuana: your questions answered
Is it possible to lend in dollars in Mexico?
Yes, a debt can be denominated in dollars. However, Mexican monetary law in principle allows repayment in Mexico of the peso equivalent at the exchange rate on the day of payment. Spell this out in the contract to avoid unpleasant surprises.
My debtor lives in San Diego: which court should I go to?
It depends on the contract, the place of payment and where the debtor's assets are. A pagaré payable in Tijuana makes action in Mexico easier, but seizing assets in California requires a US procedure. Consult a lawyer experienced in binational disputes.
Where can I report a fake lender operating from the United States?
File a denuncia with the Fiscalía de Baja California, then report the facts to the Federal Trade Commission and the FBI's IC3. Warn your bank immediately so it can try to block or dispute the transfers already made.
Can a migrant get interest-free help in Tijuana?
Some shelters, parishes and associations offer one-off assistance, sometimes repayable without interest. Be wary of anyone offering a loan in exchange for your papers or a border crossing: these are clear signs of exploitation.