In 2026, Meituan’s Mexico site implemented its strictest-ever regulations regarding RFC tax ID numbers. The platform requires that the entity registered for a cross-border store match the entity associated with the RFC tax ID number in the backend, completely eliminating the possibility of using a third-party tax ID; sellers without an RFC tax ID face withholding taxes of up to 36% (16% in VAT + 20% in income tax). By July 20, 2026, Mercado Libre had completed tax ID verification for all sellers, and non-compliant accounts were restricted from operations.

Of even greater concern to sellers is that Meikeduo recently launched an RFC consistency AI self-check tool. When the registered entity of a cross-border store does not match the entity associated with the RFC tax ID in the backend, sellers can use DocuSign to sign mutual authorization letters and upload the original PDF version of the CSF file directly from the SAT website. After the system performs a two-step verification, results are available within 2–3 business days. The launch of this tool has transformed the tax compliance process—which previously relied on manual work orders—into a 24/7, 7-day-a-week self-service closed-loop system.

Qicaiying Group specializes in cross-border e-commerce services for the Latin American market and has helped over 200 companies complete their onboarding on Mercado Libre, handle RFC/CPF/CNPJ tax registration, and establish local warehouses. From Mexican RFC registration to establishing local companies in Brazil, and from CBT PRO integration to full-scale warehouse operations, Qicaiying offers one-stop compliance solutions for expanding into Latin America. For inquiries, call 18676749275 or add us on WeChat: Qicaiyingjituan

I. RFC Tax ID: A Must-Have for the Mexican Market

On the Mexican site of MeKeDuo, the RFC tax ID has gone from being “optional” to “mandatory.” The withholding tax rates vary significantly depending on the RFC status:

• Chinese sellers with an RFC tax ID (offshore RFC): The platform withholds VAT at a rate of 16%; income tax is exempt; the combined tax rate is 16%;
• Sellers with a local Mexican RFC tax ID and a linked local bank account: Value-added tax withheld: 8%; income tax withheld: 2.5%; combined tax rate: 10.5%;
• Sellers with a local RFC but a bank account held overseas: Value-added tax withheld: 16%; income tax withheld: 2.5%; combined tax rate: 18.5%;
• Sellers without an RFC tax ID: The platform withholds 16% in VAT and 20% in income tax, for a combined tax rate of 36%.

What does 36% mean? If you sell something for 100 pesos, the platform takes 36 pesos right off the top. For cross-border sellers whose profit margins are already slim, this is practically like working for nothing. Therefore, having an RFC tax ID is not just a compliance requirement—it’s a battle to protect your profits.

II. Entity Consistency Verification: The Practice of Borrowing Tax ID Numbers Has Been Shut Down

Starting in June 2026, Meike Duo will implement RFC entity consistency verification in Mexico: the entity name used to register a cross-border store must match the entity name associated with the RFC tax ID bound to the backend. Common gray-area practices used in the past, such as “borrowing tax ID numbers” or “linking to someone else’s tax ID,” have been completely shut down, and the withholding tax rate for stores using someone else’s tax ID has been raised directly to 36%.

Common causes of subject-verb disagreement include:

• The company registered for the store does not match the company associated with the RFC tax ID;
• Use a personal RFC to link a business store;
• The RFC was obtained through a third-party service provider, but the tax ID is actually assigned to the service provider or another party.

Once the platform detects a discrepancy in the entity information, the seller must complete the verification process within the specified timeframe; otherwise, the store’s operations will be restricted.

III. AI Self-Assessment Tool: 24/7 Self-Service Closed-Loop System

To address the pain points sellers face during the RFC compliance verification process, Meike Duo has launched a combination of FAQs and an AI-powered self-service query tool. The verification process consists of two steps:

Step 1: Sign the letter of authorization. Complete the signing of the authorization letters by both the merchant and the RFC owner on DocuSign, and simultaneously upload the E.firma digital seal, which consists of a .cer certificate, a .key private key, and a password.

Step 2: Submit the CSF file. Submit the original PDF version of the CSF file downloaded directly from the SAT official website within the past 6 months (scanned copies or screenshots are not permitted).

Results will be available 2–3 business days after the system completes its dual verification. Once the status changes to “Approved,” new orders will be processed at the new withholding tax rate within 1–2 business days.

To resolve issues such as “submissions with no updates,” “returned submissions,” “instant rejections,” and “abnormal point deductions,” sellers can add the Meikeduo Cross-Border Assistant and link it to their store email. In the chat window, enter the three keyword phrases “RFC Issue Collection,” “RFC Consistency Signature Inquiry,” and “ “CSF Email Query” to retrieve the corresponding forms. This ensures standardized processing: follow-up within 5–7 business days, confirmation of email receipt and signature status within 2 business days, and CSF email response within 2 business days, respectively.

This self-service closed-loop process significantly shortens the verification cycle, but it also places higher demands on the accuracy and completeness of the documents submitted by sellers. Any errors in file format, non-compliant signatures on letters of authorization, or expired CSF documents may result in verification failure.

Qicaiying Group has localized compliance teams in Latin American markets such as Mexico and Brazil, offering one-stop services including guidance on setting up a Mercadosite account, processing RFC (Mexico), CPF (Brazil), and CNPJ (Brazil) registrations, local company registration, opening local bank accounts, integration with FULL warehouses, and tax filing. Contact number: 18676749275. Add us on WeChat: Qicaiyingjituan

IV. RFC Registration Paths: Offshore RFC vs. Onshore RFC

Sellers can choose the RFC registration path that best suits their business size and stage of development:

Option 1: Offshore RFC (suitable for Chinese cross-border stores).

• There is no need to register a company in Mexico;
• Comprehensive withholding tax rate: 16%;
• The processing time is relatively short;
• Ideal for startups or small- to medium-sized sellers.

Option 2: Local RFC (suitable for those looking to establish a strong presence in the Mexican market).

• You must register a company in Mexico (such as an S. de R.L. de C.V. or an S.A. de C.V.);
• Link a local Mexican bank account;
• The comprehensive withholding tax rate may be reduced to 10.5%;
• You can apply to open a local store on Meike Duo and a local FULL warehouse;
• Ideal for sellers with stable monthly sales who plan to build a long-term presence in the market.

Qicaiying Group offers registration services for both offshore and onshore RFCs, and recommends the most suitable tax structure based on the seller’s business scale, financial strength, and development goals.

V. New Leon Warehouse to Begin Operations in September: Balancing Logistics Benefits and Tax Compliance

Meike Duo’s new 70,000-square-meter distribution center in Nuevo León, Mexico—a $4.6 billion investment—is set to begin operations in September, reducing delivery times in the northern region to next-day delivery. For sellers who have established local full-fulfillment warehouses in advance and completed the main consistency verification for their Regional Fulfillment Centers (RFCs), this will bring significant logistics benefits.

However, tax compliance is a prerequisite for reaping the benefits of logistics. Only sellers who hold a valid RFC tax ID and have completed entity consistency verification can have their inventory properly stored in warehouses, receive normal payments, and enjoy search ranking benefits. If tax issues arise, sellers will not only be unable to store their inventory in warehouses but may also face retroactive tax collection.

VI. Conclusion: RFC Compliance Is the Lifeline of the Mexico Site

The tightening of RFC regulations on the Mexican site of MeKeDuo is essentially driving the market from “unregulated growth” toward “compliant operations.” For sellers, the sooner they comply, the sooner they’ll benefit; the later they comply, the higher the risk.

If you have not yet registered for an RFC tax number, or are concerned about failing the entity consistency verification, we recommend contacting a professional team as soon as possible to handle the matter. Qicaiying Group is a council member of the Shenzhen Cross-Border E-Commerce Association, with a 400-person professional team and a local service network spanning more than 40 countries, having served over 18,000 corporate clients to date. Whether you need an offshore RFC, a local RFC, consistency verification, or local company registration, you can contact Qicaiying to obtain a customized compliance solution for the Mexican market. Consultation Hotline: 18676749275; Add WeChat: Qicaiyingjituan

Qicaiying Group is a board member of the Shenzhen Cross-Border E-Commerce Association, with a professional team of 400 and a local service network spanning more than 40 countries. Whether you need assistance with setting up a Meitiao store, RFC/CPF/CNPJ tax compliance, or establishing local or overseas warehouses, contact Qicaiying to receive a customized Latin American market expansion plan. Consultation Hotline: 18676749275; Add WeChat: Qicaiyingjituan

VII. Frequently Asked Questions for Sellers

Q1: How do I choose between an offshore RFC and an onshore RFC?

A: Start-ups or small-to-medium-sized sellers may opt for an offshore RFC (16% combined tax rate); sellers planning to focus on the local market and apply for a FULL warehouse are advised to register for a local RFC (10.5% combined tax rate).

Q2: What should I do if the RFC compliance check fails?

A: Check whether the CSF document is the original PDF from the SAT website, whether the DocuSign authorization letter has been signed by both parties, and whether the E.firma digital seal is complete.

Q3: How long does it take for the AI self-assessment tool to generate results?

A: Results are typically available within 2–3 business days after submitting all required documents. Once the status changes to “Approved,” new orders will be processed at the new tax rate within 1–2 business days.

Q4: Can I register under someone else’s RFC?

A: No. If a discrepancy in the business entity is detected, the withholding tax rate will be increased to 36%, and your store may face restrictions.

Q5: How does Qicaiying help with RFC compliance?

A: We provide end-to-end services, including offshore and onshore RFC registration, preparation of compliance verification documents, coordination with local Mexican accountants, and tax filing. For inquiries, call 18676749275 or add us on WeChat: Qicaiyingjituan.

VIII. Common RFC Compliance Errors and Solutions

When actually applying for and verifying an RFC, sellers are prone to making the following mistakes, which require special attention:

Mistake 1: Using scanned or screenshot versions of the CSF file. The platform requires the submission of the original PDF version of the CSF file downloaded directly from the SAT official website; scanned copies or screenshots will be rejected by the system.

Error 2: The E.firma digital seal information is incomplete. .The .cer certificate, .key private key, and password must all match exactly; any missing information will result in verification failure.

Mistake 3: The signatory on the letter of authorization does not match the authorized party. The DocuSign authorization letter must be signed by both the store’s registered entity and the RFC holder; any incorrect information provided by either party will result in the verification being rejected.

Mistake 4: Incorrect selection of RFC type. Personal RFCs and corporate RFCs are intended for different scenarios; using a personal RFC when linking a corporate store will result in a mismatch in the account holder.

If you encounter the issues mentioned above, we recommend that you stop repeatedly submitting the application on your own. Instead, have a professional team verify the completeness and consistency of your documents first, and then resubmit the application to avoid multiple failed submissions. Qicaiying Group offers end-to-end services for RFC processing and consistency verification. Consultation Hotline: 18676749275; add us on WeChat: Qicaiyingjituan.

IX. The Mexican Market: Growth Potential Following RFC Compliance

Achieving RFC compliance is just the first step in operating on the Mexico site. Next, sellers can apply to open a local Mercado Libre store, list products in local FULL warehouses, participate in the platform’s major promotional events, and expand their brand stores. As the second-largest e-commerce market in Latin America, Mexico has over 100 million monthly active users; products stored in local warehouses qualify for the “next-day delivery” badge and receive significantly higher search rankings.

For sellers who have already completed RFC registration, we recommend simultaneously evaluating the registration of a Mexican company and the establishment of a local warehouse to turn tax compliance into logistics and traffic advantages. Qicaiying Group provides one-stop services including Mexican company registration, RFC processing, integration with FULL warehouses, and tax filing. Consultation Hotline: 18676749275. Add WeChat: Qicaiyingjituan.

X. Recommendations for Next Steps

Sellers on the Mexico marketplace should immediately check the RFC binding status in their account dashboard: verify that the taxpayer ID holder matches the store’s registered entity and that the CSF file is still valid. If any discrepancies are found, use the AI self-check tool or contact a professional team as soon as possible to resolve the issue. Qicaiying provides RFC registration, consistency verification, and tax filing services to help you achieve compliance within 7 days. For inquiries, call 18676749275 or add WeChat: Qicaiyingjituan.