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Latin American E-Invoicing

Steve Sprague - Invoiceware International

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Mexico eInvoicing - Inbound Validation is Required

11 July 2012  |  2503 views  |  0

One of the top questions that comes up in virtually every Mexico e-Invoicing meeting is: Do I really need to do the inbound validation of invoices?  

Many companies think that they don't have to do the inbound validations; however, this oversight can lead to jail time and heavy fines. 

There reality is that if you must validate inbound supplier invoices if you are using those invoices for the purposes of deductions of tax credits.  It is directly on the Mexico SAT website:


So it is not a technical enforcement that should be driving decisions.  Instead it should be a fiscal decision.  In Mexico, you pay taxes to the government based on the net difference (i.e. the tax you charge your customers minus the tax that you pay your suppliers). 

Value added tax collected from clients
-Value added tax paid to suppliers
= Payable IVA 

If you are deducting these tax payments on your fiscal books, then not validating every single inbound invoice is just lighting the fuse of a "audit bomb" and then throwing acclerant onto the flame.

We have seen Mexico over the last 12 months move more towards the Brazil NFe model on the outbound invoices; whereby; the approvals are required prior to the truck leaving a warehouse.  We also expect to see similar mandated legislations in a more formal technical design in coming months for inbound processing.  However, this is not a plausible excuse to wait on the implementation of inbound validation.  You should start this asap.

In Mexico with v.3.2, your suppliers must make the XML invoice available to you.  This is traditionally done via e-mail. But many companies are looking at EDI communication as well as upload portals to simplify their process of collection.  Once you have this XML, you can validate the signatures, certain values, and post returned validation signatures in your system of record. This will ensure, when/if you are ever audited, that all of the invoices and all of the tax deductions you are taking are from only valid and government approved invoices.  The process is not difficult, but too many companies are putting their fiscal manager and controllers at risk of criminal penalities.  These can all be avoided with a short 4-6 week project.  Make sure you understand the realities of both the technical requirements as well as the fiscal requirements -- they are not separate issues anymore.


TagsRisk & regulationPost-trade & ops

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job title VP Product Strategy
location Marietta
member since 2012
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Steve Sprague has been working in the electronic invoicing and middleware integration space for over 13 years. As VP, Product Strategy & Marketing for Invoiceware International, Steve manages product...

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