From a $269M MXN assessment to less than $9M. ZERO PENALTIES paid.
How a manufacturer under a three-year SAT audit reduced its exposure by 96.7% with Prodensa
CASE BACKGROUND
The Specialized Audit Team
Combining experts from different specialties to create a highly effective solution for our client.
CHALLENGES
- No electronic file control maintained per transaction, leaving the evidentiary record incomplete
- Annex 24 inventory control system lacked modules required to confirm full regulatory coverage
- Annex 30 presented comparable system gaps that could not be demonstrated to the authority
- Audit reached back to fiscal year 2017 — records furthest from current practice and hardest to reconstruct
- High personnel turnover disrupted continuity of internal controls and compliance processes
- Documentation folders left incomplete by successive teams with no structured handover
- Once the auditable period opened, gaps could no longer be quietly corrected — every deficiency required a written response to SAT
- Failure to respond to the invitation letter in complete form triggered a formal audit across all three fiscal years
The Prodensa Solution
Prodensa built the defense around a single strategic objective: reduce the economic impact to the minimum, and organized every discipline in the firm around it.
- Leadership
- Specialists
- Legal
- PRODECON
- Proactivity
- Deadlines
Leadership with authority-side experience.
The engagement was directed by a Prodensa executive with extensive experience of SAT procedures. That perspective set the path: what to expect, how to sequence the response, and which arguments would hold.
Annex24 specialists answering the technical record.
The Annex 24 team handled every report SAT requested from the inventory control system, delivered on time and in the required form. When the authority had questions (and it had many) the same team took the calls, walked through each report line by line, reconfigured outputs where more detail was needed, and resubmitted.
Legal grounds and controlled communication.
Prodensa's legal team led the substantive arguments, the formalities, and the direct contact with the authority. Just as importantly, it set the tone: persistent without applying pressure, maintaining a working relationship with SAT rather than an adversarial one.
Escalation to PRODECON
As the matter advanced, Prodensa brought in PRODECON, Mexico's taxpayer advocate service, as an intermediary in the negotiation, a standard and legitimate mechanism in audit proceedings that widened the path to a negotiated close.
A legal representative who did not wait.
Prodensa's designated legal representative before SAT stayed permanently on top of the file: what could be shared, what could not, what the authority needed next, and relaying each instruction back to the operating team the same day. At no point in the engagement was Prodensa waiting on the authority.
Operations executing under a hard deadline.
When the resolution finally came, it came with a 15-day window to regularize all merchandise. That window fell across the December holidays and SAT's own vacation period. Approximately 47 pedimentos had to be prepared, filed and paid before January 7.
RESULTS
Prodensa Tips
If your company receives an invitation letter from SAT, the outcome is largely decided in the first few weeks. Our team's recommendations:
- Attention
- Petition
- Requests
- Response
- Balances
- Transparency
- Controls
- Engage
Treat the invitation letter as the decisive moment.
It is the last point at which you can still correct your own record. Once an auditable period opens, that option is gone.
Analyze in precise detail wha the authority is actually asking for.
Understand the scope before you respond.
Answer exactly what was requested: no more, no less.
Incomplete responses fail. Over-disclosure opens doors the authority had not opened.
Respond promptly and in the correct form.
Timeliness and format are not procedural details; they are the difference between clearing the letter and entering an audit.
Settle any outstanding balances within the window given.
The letter provides a defined number of days. Use them.
Maintain real Annex 24 control and 100% inventory transparency.
What is physically on the plant floor and what is in the system must reconcile: always, not only when someone asks.
Keep electronic file control per transaction as a daily discipline.
The documentary record you build in the ordinary course of business is the same record that will defend you years later. Preventive process discipline is what keeps a company out of an auditable period in the first place.
Engage specialists early, and stay on offense.
Bring in legal and foreign trade experts before the situation escalates. And once the process starts, drive it. Persistent, professional, well-founded follow-up with the authority is what moves a file forward.
SCHEDULE A MEETING WITH AN EXPERT
Prodensa has supported foreign manufacturers operating in Mexico for over 40 years, including IMMEX compliance, Annex 24 and Annex 30 control, and audit defense.
