Do You Need to Verify a BIR Letter of Authority (LOA) in the Philippines?
Yes. All taxpayers, individuals, SMEs, and corporations must verify the authenticity of a BIR Letter of Authority (LOA) before responding to any audit or inspection to avoid fake audits, unauthorized inspections, and compliance risks.
The Bureau of Internal Revenue officially introduced real-time LOA verification via the REVIE chatbot under Revenue Memorandum Circular (RMC) No. 5-2026, allowing taxpayers to confirm whether an audit is legitimate—without visiting a BIR office.
Quick reminder: No valid LOA = no valid BIR audit.
For optional reference, you may check this link: https://bir-cdn.bir.gov.ph/BIR/pdf/RMC%20No.%205-2026.pdf
Quick Answer
If a revenue officer claims to audit your business, you should first verify the LOA through the BIR REVIE chatbot.
This protects your company from fake audits, unauthorized inspections, and unnecessary exposure to penalties.
What Is a Letter of Authority (LOA) in the Philippines?
A Letter of Authority (LOA) is an official document issued by the BIR authorizing a specific revenue officer to examine a taxpayer’s books, records, and tax compliance for a specific taxable period.
Without a valid LOA:
- No audit should begin
- No documents should be requested
- No inspection should be allowed
Key Features of the BIR LOA Verifier via REVIE
The LOA Verifier introduced under RMC No. 5-2026 helps taxpayers:
- Confirm if an LOA is valid before engaging with auditors
- Prevent fake audits and unauthorized inspections
- Reduce disputes and harassment
- Strengthen internal compliance controls
- Verify LOAs instantly without visiting a BIR office
This is especially critical for corporations, foreign-owned entities, and SMEs operating in Metro Manila and Pasig.
How to Verify Your LOA Using the REVIE Chatbot (Step-by-Step)
Step 1: Access the REVIE Chatbot
Go to the official BIR website and open REVIE.
Step 2: Select Your Preferred Language
Choose English or Filipino.
Step 3: Choose “LOA Verifier”
Enter the following:
- Taxpayer Identification Number (TIN)
- Registered Business Name
- LOA Case Number
Step 4: Review the Result
You will receive an instant response:
- LOA FOUND – The audit is valid
- LOA NOT FOUND – No record exists in the system
What If the LOA Is Not Found?
If the LOA is not reflected in REVIE, proceed with manual verification:
- Email: contact_us-LOA@bir.gov.ph
- Attach a copy of the LOA
- Include:
- TIN
- Taxpayer Name
- LOA Case Number
- Issuing Office (RDO, RR, LTS, or NID)
Expected response: within three (3) working days
Why LOA Verification Matters for Businesses in the Philippines
1. Protection Against Fake Audits
Scammers often impersonate BIR officers. LOA verification prevents fraud and unauthorized access.
2. Stronger Audit Readiness
You respond only to legitimate audits, reducing risk and operational disruption.
3. Better Internal Controls
Companies can embed LOA verification into their tax and audit compliance procedures.
4. Reduced Legal and Financial Exposure
Avoid penalties, reputational damage, and unnecessary stress.
Common LOA-Related Risks and How UNA Helps
| Issue | Risk | How UNA Supports You |
| Responding to fake auditors | Fraud, penalties | LOA verification and audit screening |
| Poor audit preparation | Adverse findings | Pre-audit cleanup and review |
| Missed deadlines | Surcharges & interest | Full BIR audit support |
| Weak documentation | Compliance exposure | Accounting and tax compliance advisory |
Final Thoughts
At UNA Tax and Accounting Services, a registered accounting firm based in Pasig, we assist businesses across Metro Manila and the Philippines with:
- LOA verification and audit legitimacy checks
- BIR audit support and representation
- Corporate tax compliance and advisory
- Accounting, audit, and assurance services
Need help verifying an LOA or preparing for a BIR audit?
Book a free consultation with our compliance professionals today.
