What is CEP of SPEI?

Authenticity verification: It is the only format that allows you to prove the document has not been altered.
Automation: Direct integration to ERP systems and accounting software.

CEP stands for Electronic Payment Receipt (Comprobante Electrónico de pago in Spanish) wich is a digital document issued by Banxico to proof that a transfer has been made through SPEI.

The CEP is a trusted infrastructure that can streamline your accounting reconciliation, strengthen your fraud prevention efforts, and enhance the professionalism of your tax documentation.

The difference between using it as a simple file and turning it into an operational advantage lies in understanding its architecture and strategic potential.

What is the Electronic Payment Receipt?

The Electronic Payment Receipt (CEP) is a digital document issued directly by the Bank of Mexico (Banxico) that certifies that an SPEI transfer was processed, settled, and credited correctly.

Learn what SPEI is and how it handles instant electronic payments. 

This mechanism transforms SPEI from a simple payment system into a modern, trusted interbank payment infrastructure where every transaction guarantees:

• Operational transparency: provides all parties involved with complete and verifiable information about every payment processed in the SPEI ecosystem.
• Absolute traceability: creates an official record that allows any interbank transfer to be tracked, validated, and audited with documentary certainty.

What is the CEP used for?

The SPEI CEP serves as a strategic tool for corporate treasury. Its main functions are:

• Tracking of banking transactions: Allows verification of payment settlement or, conversely, whether it has been returned or rejected.
• Fiscally valid document for bank reconciliation: Due to the documentation required to issue a CEP, it is recognized as an official document by tax authorities.

What information does the CEP contain?

A legally valid CEP of a transfer contains the following structured data:

• Transaction details: Exact date and time of the transaction, amount transferred, and reference number (chosen by the payer).
• Tracking code: A unique identifier assigned by the system.
• Complete information on the parties: Name, Tax ID (RFC), and CLABE account number.
• Institutional context: Name and Tax ID (RFC) of the issuing bank and the receiving bank.

This data architecture makes the CEP much more than a receipt. It is a record of to whom, when, and through which institutions the transaction was made, allowing for cross-validation from multiple angles.

Can the CEP be forged?

No, thanks to its three-layer cryptographic architecture—Certificate Serial Number, Original String (data fingerprint), and Digital Seal (Banxico’s electronic signature)— it is guaranteed not only to be unforgeable but also that the document has not been altered since its issuance.

How to generate a CEP?

To obtain a CEP, you must visit Banxico’s official Payment Receipt Generator (CEP) portal and fill out the form with the required information:

• Date the payment or electronic transfer was made
• Tracking code or reference number
• Issuing and receiving institutions
• Beneficiary account (CLABE, card, or cell phone number)

In what format should I download my CEP?

The Electronic Payment Receipt (CEP) is issued in two complementary formats: PDF and XML. Best practice is to download both formats simultaneously to ensure both visual accessibility and technical integrity:

How to verify the authenticity of the CEP?

Banxico provides a tool, the Banxico CEP Validator, where, if you upload the XML file, the system automatically verifies that the three security elements are legitimate and correctly linked.

Why is it important to verify the CEP? Verification confirms that the CEP comes directly from Banxico: unaltered and unmodified.

How do companies use the CEP?

Below, we share four examples of how leading companies integrate the CEP from a transfer into their daily operations: account reconciliation, fraud prevention and identity verification, tax documentation, and resolution of operational disputes.

1. Efficient Accounting Reconciliation

The CEP’s XML format supports structured data that can be directly integrated with ERPs and accounting platforms.

Operating with a modern interbank payment infrastructure for businesses provides a built-in advantage, transforming reconciliation into a continuous verification process rather than a reactive end-of-month task.

2. Fraud prevention and identity validation

The National Commission for the Protection and Defense of Financial Services Users (CONDUSEF) has documented cases where companies transfer funds to accounts that do not belong to the legitimate supplier.

To prevent this, a preliminary micro-transaction can be performed to verify that the account holder’s RFC matches that of the supplier. This is possible because the CEP reveals account holder information that is not available when simply entering an interbank CLABE.

3. Tax Evidence and Audits

The CEP is your most valid tax document because it is issued by the monetary authority and contains unique elements:

• Full RFC of the payer and payee
• Date and time certified by Banxico
• Amount with a digital seal guaranteeing no alteration
• Complete traceability of participating institutions

Since the CEP is no longer available after 45 business days at Banxico, it is good practice to download, organize, and retain the PDF and XML files for each transaction.

4. Resolving Operational Disputes

Because of its transparency and traceability, when a supplier claims they did not receive payment, the CEP serves as the single source of truth. It shows the exact status of the transaction and eliminates protracted disputes by providing objective evidence that neither party can dispute. 

The Three Most Common Mistakes Companies Make with the CEP

In the instant payments ecosystem, the CEP has established itself as the sole institutional source of truth for validating the settlement of a transfer. However, it is a system that is still prone to user errors.

Below, we analyze three critical errors you can avoid to take full advantage of CEP.

Mistake 1: Not downloading the CEP within 45 days

Banxico keeps CEPs available in its system for 45 business days from the transaction date. After that period, the receipt disappears from the official portal and only exists if you downloaded it in a timely manner.

It is important to keep and file both documents (PDF and XML) so that, in the event of a dispute or audit, you have access to the information.

Recommended procedure:

• Download the CEP immediately after confirming settlement (wait up to 30 minutes after the transaction).
• Assign a specific person to handle this task or automate it.
• File it in a repository organized by tax period.

Mistake 2: Archiving only the PDF without keeping the XML

Both formats are complementary, not interchangeable. The best practice is to archive the PDF and XML for each transaction, organized by month and fiscal year.

The PDF is for human viewing, but the XML contains the operational value of the receipt. Without XML, you cannot automatically integrate data with your ERP, validate authenticity using Banxico’s official tool, or process information from multiple CEPs automatically.

Mistake 3: Relying solely on bank receipts

Your online banking portal generates a receipt when you initiate a transfer. That document confirms that your bank processed your payment instruction, but it does not confirm that the funds reached the recipient.

A transfer may be rejected due to incorrect information or returned because the account is inactive. Your bank statement does not reflect these scenarios, but the CEP does.

This difference is why companies that operate with infrastructure providing full traceability gain superior operational visibility: they don’t assume the payment arrived; they have certified confirmation.

The CEP as a Reconciliation Tool for Businesses

The Electronic Payment Receipt (CEP) represents one of Banxico’s least visible yet most valuable contributions to the Mexican financial ecosystem.

Leading organizations no longer view the receipt as an isolated document that someone must manually download, but rather as valuable metadata that flows automatically between their payment platforms, accounting systems, and treasury processes.

At Cobre, we built our solution to integrate with local payment rails such as SPEI using certified infrastructure, with on-demand reports that provide comprehensive information on each transaction and webhooks that notify you of transactions in real time.

This architecture gives your team immediate visibility into the status of each payment, making it easy to obtain CEPs and verify settlements without relying on slow manual processes.

Ready to operate with SPEI infrastructure for businesses that provides full traceability, real-time reports, and automatic webhooks? Explore how Local Payments works and transform your payment operations.

Frequently Asked Questions 

How do companies use CEP to optimize payment processes?

The CEP’s XML format contains structured data that integrates directly with ERPs and accounting systems. Companies with high payment volumes automate CEP processing, eliminating manual reconciliation and transforming it into continuous verification, which significantly reduces accounting close times.

What should you do if the CEP shows a delay in transfers to critical suppliers?

If the status shows “rejected” or “returned,” verify the beneficiary account details. Implement preventive validation by sending a micro-transaction before the actual payment. The CEP displays the name and RFC of the actual account holder, confirming that the CLABE exactly matches the authorized supplier before transferring large amounts.

How should CEPs be managed for tax audits and regulatory compliance?

Organize CEPs in PDF and XML format by tax period within 45 business days of the transaction date, using tracking codes as identifiers. For high volumes, a modern interbank payment infrastructure automates the archiving process. The CEP serves as the most valid tax evidence because it contains the RFCs of both parties along with Banxico’s digital seal.

Are the CEP and the bank receipt the same thing?

No. The receipt issued by your bank only confirms that the institution received your payment instruction (proof of transmission). In contrast, the CEP document from Banxico confirms that the process was completed and the funds were credited to the recipient (proof of settlement).

In other words, the receipt confirms that you ordered the transaction, and the CEP certifies that the transaction was successfully completed.

Can CEP transactions be automated?

Yes. Modern interbank payment platforms operating on certified SPEI infrastructure offer the following capabilities: automatically archived CEPs, direct integration with accounting systems, reduced administrative tasks, and an organized, searchable archive.

The manual process works for occasional transfers, but for companies with high transaction volumes, automation is not a luxury but an operational necessity.