“My store’s payment of 35% was frozen right away!” Last month, Mr. Chen, a Shenzhen-based seller who had been operating on Meituan’s Mexico site for three years, contacted us in a state of panic. His store had always been registered under a third-party service provider, and his own company had never applied for a Mexican RFC tax ID. In July of this year, after Meituan launched its RFC validity verification process, the platform’s system prompted him to upload a CSF file and complete electronic signature verification. However, he didn’t even have his own RFC number, let alone authorization from his business entity. As a result, in less than two weeks, his store’s sales were subject to mandatory withholding at a punitive tax rate of 361 TP3T—a tax burden far exceeding his profits.

Mr. Chen’s situation is not an isolated case. The Mexican Tax Administration Service (SAT) is steadily tightening its cross-checking of tax data with Mercado Libre, and the compliance grace period for Chinese sellers is rapidly coming to an end. If your store has not yet completed RFC entity verification, or if you suspect you are still using a borrowed or borrowed-in tax ID, now is your last chance to rectify the situation. As a board member of the Shenzhen Cross-Border E-Commerce Association, Qicaiying Group operates its own accounting firm and a licensed secretarial company, our professional team of over 400 members has served more than 18,000 corporate clients and can assist sellers with the full range of compliance services, including Mexican RFC registration, CSF file acquisition, e.firma electronic signature verification, and the establishment of local companies.For inquiries, call 18676749275 or add us on WeChat: Qicaiyingjituan.

I. Three Key Timelines: Why Is the RFC Verification in Mexico a ”Countdown”?”

Many sellers have yet to realize that RFC verification on the MeKeDuo Mexico site is not a matter of ”whether or not to cooperate,” but rather a mandatory requirement that ”must be completed.” Based on the coordination schedule between the platform and SAT, there are three key deadlines that all sellers should take note of:

1. June 2026: Launch of the RFC Entity Authorization Consistency Verification

Starting in June 2026, Meiketuo will begin verifying whether the RFC information of store owners matches the actual business entity. The platform will compare store registration information, the name of the payee account holder, and legal representative information against the RFC registration details to ensure they align. Any instances of ”borrowing an RFC,” ”using a service provider as a front,” or ”using another party’s tax ID” will be flagged during this verification round.

2. July 20, 2026: RFC validity verification goes live, and electronic signatures become mandatory

Effective July 20, 2026, Meitodo will officially launch RFC validity verification. Sellers are required to upload their CSF (Cédula de Identificación Fiscal) document and complete the verification process using the SAT’s e.firma electronic signature. This step has stumped the vast majority of Chinese sellers—the CSF file must be obtained using the electronic signature tool associated with the RFC, yet many sellers do not even have their own RFC, let alone have applied for an e.firma.

3. Until verification is complete: The 36% punitive withholding tax remains in effect

For stores where verification is incomplete or has failed, taxes will be withheld and remitted at a punitive withholding rate of 36%. This is not a one-time fine, but an ongoing cash flow drain—36% is withheld from every single sale, instantly eroding the store’s profits.

II. Comparison of the Three Tax Rates: The Real Situation Facing Chinese Sellers

To understand the seriousness of this audit, you must first understand the three-tier withholding tax rate system currently in place on the Mexico site of Meike Duo:

The comparison is clear: for the same 100 pesos in sales, local RFC sellers only have to pay 10.5 pesos in withholding tax, while non-RFC sellers face a withholding tax of as much as 36 pesos—a difference in tax burden of more than three times. More importantly,As of April 1, 2026, the SAT has implemented real-time monitoring of platform transaction data....Sellers can no longer evade regulation by ”not linking a tax ID”—now that tax data is interconnected, all transaction records are transparent and visible.

III. One Entity, One RFC: Why ”Borrowing Numbers” and ”Affiliation” Are Completely Unfeasible

In recent years, many Chinese sellers have circumvented registration costs by ”borrowing” RFC numbers from local service providers or having multiple stores share a single tax ID. However, under the dual pressure of SAT’s real-time data monitoring and entity authorization verification, these practices have become completely ineffective.

The basic rule of the Mexican Tax Authority is ”one economic entity corresponds to one RFC”; the tax ID is strictly tied to the entity behind it and cannot be shared or transferred. The ”entity authorization consistency” verification conducted by Meituo this time is intended to ensure that the RFC entity filing tax returns is exactly the same as the entity actually conducting business and receiving payments. If a discrepancy is found between the tax ID and the actual business entity, the platform will immediately deem it to lack a valid RFC and apply the highest withholding rate under the 36% policy. Additionally, the store’s credit rating and traffic weighting will be adversely affected.

What makes the situation even more challenging is that if multiple stores are registered under the same RFC, once one of them triggers a tax anomaly, all associated stores will be frozen as a result of collective liability. This ”one-for-all” risk is something no existing seller can afford to bear. Applying for an RFC under your own business entity as soon as possible, and completing the CSF upload and e.firma verification, is the only way to avoid the 36% withholding tax and associated risks.

IV. What Exactly Does Verification Involve? A Clear Explanation in Three Steps

If your Meike Duo Mexico store has already received a verification notice, or if you anticipate that your store will soon undergo verification, please be sure to understand the following three steps:

Step 1: Register and Activate the RFC Entity

Apply for a Mexican RFC in the name of your own company, rather than continuing to use a service provider’s or another party’s tax ID. The entity can be your company registered in China applying for an overseas RFC; if conditions permit, you can also establish a local Mexican company to benefit from the minimum combined tax rate of 10.51% (TP3T).

Step 2: Obtain the CSF file and complete the upload

The CSF (Cédula de Identificación Fiscal) is a tax identification document issued by the Mexican tax authorities, equivalent to the RFC’s ”ID card.” Sellers must log in to the SAT system to download the CSF file, then upload it via the Meitiao seller dashboard, ensuring that the RFC information registered in the dashboard matches the CSF file exactly.

Step 3: Complete the e.firma electronic signature verification

e.firma is the Mexican SAT’s digital signature system, consisting of a private key and a certificate, used to verify identity in the electronic tax system. Sellers must hold an e.firma that matches their RFC holder to complete the authorization verification required by Mercado Libre. This step imposes extremely high requirements for document security and compliance timelines—there are strict procedural guidelines for the signature application process, password management, and certificate renewal.

V. Qicaiying Group’s RFC Compliance Service Solution: Turning the Verification Countdown into a Tax Advantage

Faced with Mercado Libre’s rigorous verification process, sellers need more than just last-minute cramming—they need a comprehensive tax compliance solution for Mexico. With years of expertise in cross-border tax and financial compliance, Qicaiying Group offers one-stop services for sellers on Mercado Libre’s Mexico platform, covering everything from entity setup and tax ID registration to long-term tax filing:

1. Registration of an RFC Entity in Mexico and Application for an Overseas Tax ID Number

Qicaiying assists sellers in applying for a Mexican RFC tax ID number under their own business entity, closely monitors the progress of the SAT review throughout the process, and eliminates at the source the risks associated with ”borrowing ID numbers” and ”nominal registration.”

2. CSF File Retrieval and Compliance Validation

Our tax team assists sellers in downloading CSF files and verifying information within the SAT system, ensuring that every piece of data uploaded to the Meikeduo backend matches the information registered in the tax system exactly, so that it passes the platform’s verification on the first try.

3. Full-Service e.firma Electronic Signature Agency

From key application and certificate issuance to authorization confirmation, Qicaiying provides full guidance and handles all e.firma-related procedures on your behalf, helping sellers efficiently complete verification during the verification window period after July 20 and avoid having funds withheld in accordance with 36% due to procedural delays.

4. Establishing a Local Company in Mexico and Opening a Local Bank Account

For established sellers looking to reduce their withholding tax rate from 16% to 10.5%, Qicaiying offers an integrated solution that includes registering a local Mexican company, opening a local bank account, and handling local accounting—helping you secure the optimal tax structure for the Latin American market.

5. Monthly/Quarterly Tax Filings and Compliance Monitoring

Receiving your RFC is just the beginning; consistent Mexican tax filing is the key to long-term compliance. Qicaiying offers tax filing services for Mexican VAT and income tax, while simultaneously monitoring SAT regulatory updates to provide early warnings of policy changes, allowing you to focus on your operations with complete peace of mind. If you’d like to reduce your tax burden on the Meituan Mexico platform from 361 TP3T to 161 TP3T or even 10.51 TP3T, or if you need to evaluate implementation plans for a local entity, please contact Qicaiying Group to access our specialized RFC compliance services.For inquiries, call 18676749275 or add us on WeChat: Qicaiyingjituan.

VI. Why Choose Qicaiying Group

Qicaiying Group is a board member of the Shenzhen Cross-Border E-Commerce Association. The group operates its own accounting firm and a licensed secretarial company, and has assembled a professional service team of over 400 people. It has served more than 18,000 corporate clients to date, with business operations spanning more than 40 countries and regions, including South Africa, Hong Kong, Singapore, the United States, the British Virgin Islands (BVI), and the Cayman Islands.

In the highly specialized and time-sensitive field of RFC compliance in Mexico, Qicaiying’s strengths lie in:Our finance and tax team understands the logic of cross-border business, our licensed institutions understand local legal boundaries, and our 400-person team excels at operational efficiency.. From RFC applications and CSF verification to e.firma signatures and local company establishment, we’ve broken down every step into actionable, standardized processes, helping sellers avoid detours and unnecessary costs.

VII. In Closing: Compliance Is Not a Cost—It Is the Minimum Requirement for Entering the Latin American Market

Let’s return to Mr. Chen’s case. With the assistance of Qicaiying, he completed his RFC registration in Mexico under his own company’s name, uploaded the CSF, and passed the e.firma verification. As a result, his store’s withholding tax rate was reduced from 36% to 16%, and he is currently working on establishing a local company to qualify for the optimal rate of 10.5%. He ran the numbers: based on monthly sales of 2 million pesos, reducing the tax rate from 36% to 16% means retaining an additional 400,000 pesos in cash flow each month.

Mexico is Latin America’s largest e-commerce market, and the sheer volume of buyers on Mercado Libre in Mexico has caught the attention of countless Chinese sellers. However, the key to entering this market has never been traffic dividends, but rather compliance capabilities. SAT real-time monitoring is now live, Mercado Libre’s seller authorization verification has begun, and 36%”s punitive withholding tax hangs like the Sword of Damocles over all sellers operating without proper authorization.

Several weeks have passed since the July 20 verification deadline, and SAT regulations will only become stricter, not more lenient. Rather than scrambling for help after your funds have been frozen, it’s better to complete the RFC entity verification now. If you’re still unsure whether your store’s business entity is compliant, your CSF matches, or your e.firma is ready, Qicaiying Group can provide you with a free risk assessment—every detail we confirm helps safeguard your profits. Please contact Qicaiying Group to receive a one-on-one RFC compliance solution for Mexico.For inquiries, call 18676749275 or add us on WeChat: Qicaiyingjituan.

Qicaiying Group works with you to turn tax risks in the Latin American market into a safety net for sustainable growth.