U.S. mobile carriers require your submitted business information to match your official IRS Employer Identification Number (EIN) records exactly to verify your business identity for business text messaging. If your legal business name, physical address, or tax ID differs even slightly from what the IRS has on file, carrier verification algorithms will reject your registration and block your text messages from sending. Ensuring these details align guarantees that your business text messaging line is approved, allowing your automated review requests to deliver smoothly.
The Core Reason: Carrier Anti-Spam Regulations (A2P 10DLC)
If you have ever received unwanted spam texts from unknown phone numbers, you already understand why mobile networks created these rules. Major U.S. telecom carriers (AT&T, T-Mobile, and Verizon) enforce a standard called A2P 10DLC (Application-to-Person 10-Digit Long Code).
Under these carrier rules, every business that sends automated text messages—such as review requests, appointment reminders, or dispatch notices—must register their identity in a national database managed by The Campaign Registry (TCR).
When you submit your registration, an automated system cross-references the details you provided against official government databases, specifically IRS EIN business records. If the computer algorithm finds a mismatch between your submission and your government tax profile, the system marks your application as unverified.
Without an approved registration, mobile carriers will block your texts before they ever reach your customer’s phone.
What Information Must Match Your IRS Tax Records?
Carriers compare four key fields directly against your IRS business documentation. All four must be an exact match:
- Legal Business Name: This is the precise legal name listed on your official IRS document (such as Form CP 575 or Letter 147C). It is not always the name on your storefront, vehicle wrap, or website.
- Employer Identification Number (EIN): This is your 9-digit federal tax identification number.
- Legal Business Address: The physical address associated with your EIN registration at the IRS.
- Business Entity Type: Whether your company is registered as an LLC, Corporation, Partnership, Sole Proprietorship, or Non-Profit.
If your IRS confirmation letter lists your business as "Apex Plumbing & Drain Cleaning LLC" at "104 Main St, Suite B", but you register under "Apex Plumbing" at "104 Main Street", the automated verification system will flag it as a failure.
The 4 Most Common Mistakes That Cause Rejections
Most small business owners do not fail registration because they are doing anything improper—they fail because of minor formatting discrepancies or using trade names instead of corporate names.
1. Using a DBA or Brand Name Instead of Your Legal Entity Name
You might operate your business locally as "Quick Dry Carpet Cleaning," but your actual legal entity registered with the IRS is "QD Cleaning Services LLC."
- Incorrect: Quick Dry Carpet Cleaning
- Correct: QD Cleaning Services LLC
If you operate under a Doing Business As (DBA) name, your submission must still list your official legal entity name tied to your 9-digit EIN.
2. Punctuation, Spacing, and Abbreviation Inconsistencies
Carriers use automated computer scripts to verify details against state and federal records. While a human knows that "St." means "Street," automated verification scripts often fail entries for minor formatting differences.
- Incorrect: Apex Heating and Air Inc
- Correct: Apex Heating & Air, Inc. (matching the exact commas, ampersands, and periods on your IRS letter)
3. Mismatched Business Address
If your business moved locations three years ago but you never updated your address with the IRS using Form 8822-B, your EIN is still registered to your old address. Entering your current job site or new office address during A2P registration will trigger a mismatch error.
You must submit the legal address currently on file with the IRS, even if it is your home address or a previous office location.
4. Entering a Sole Proprietorship Without an EIN
If you operate as a sole proprietor using your Social Security Number (SSN) rather than an EIN, you must register through a specific Sole Proprietor registration pathway. Entering a personal SSN into a standard corporate EIN field will result in an immediate system error.
Why Exact EIN Matching Is Crucial for Your Review Requests
SoTrustworthy uses an SMS-first workflow to help home-service and local businesses capture customer feedback right after a job is completed. Because text messages boast open rates near 98%, sending SMS review links is the single most effective way to collect steady 5-star Google reviews.
However, if your business phone number is unverified due to an EIN mismatch, carriers will silently drop your outbound messages. Your customers will never receive your review link, disrupting your lead generation pipeline.
How SoTrustworthy Handles Messaging Compliance
When you sign up for SoTrustworthy—whether on our Starter, Growth, or Pro plan—we walk you through the A2P registration process during setup so your text messages remain fully compliant.
SoTrustworthy builds compliance into every campaign:
- Built-in Opt-Out Compliance: Every initial automated message gives customers a simple way to opt out (e.g., "Reply STOP to unsubscribe"), protecting your carrier reputation.
- Review-Request Throttling: SoTrustworthy automatically throttles message volume to prevent sudden spikes in texting activity that might trigger carrier spam filters.
- 100% Policy Compliant Review Requests: We strictly follow Google review policies. We never engage in review gating (filtering unhappy customers away from public review sites), ensuring your Google Business Profile remains safe from penalties.
- Seamless Field Service Integrations: Through native integrations with tools like Jobber and HubSpot, review requests trigger automatically when a work order or deal is closed in your CRM—sent from your fully verified, carrier-approved texting number.
How to Find Your Exact IRS Details Before Registering
To prevent delays during your 14-day trial or account setup, locate your official tax documents before filling out your SMS registration form.
Step 1: Locate Your Official IRS Document
Look for one of these standard IRS documents in your business tax files:
- Form CP 575: The original confirmation letter issued by the IRS when your EIN was assigned.
- Form 147C: An official EIN verification letter issued by the IRS if you requested a duplicate copy.
- Form 1120 or 1065: Your recent corporate or partnership tax returns (look at the top section for the legal name and address).
Step 2: Copy the Details Character-for-Character
Look closely at the box containing your business name and address on your IRS letter. Copy the exact spelling, capital letters, spacing, and punctuation directly into your registration form.
Tip: If you cannot find your CP 575 or 147C letter, call the IRS Business & Specialty Tax Line at 1-800-829-4933 to request a free 147C confirmation letter.
What Happens After You Submit Correct Details?
Once your business information matches your IRS documents precisely:
- Carrier Approval: The Campaign Registry verifies your legal identity, usually within 1 to 5 business days.
- High Deliverability: Your business receives an approved Trust Score, ensuring your texts pass cleanly through T-Mobile, AT&T, and Verizon networks.
- Automated Review Delivery: Your automated SMS review requests arrive on your customers' phones moments after your technicians wrap up a job, bringing in fresh reviews reliably every week.
Related Topics & Next Steps
- Verify Your IRS Letter: Find your CP 575 or Form 147C to double-check your official legal entity name and registered address before submitting your registration.
- Review Your CRM Setup: If you use Jobber or HubSpot, check that customer phone numbers are logged in standard 10-digit mobile formats to ensure maximum deliverability once your registration is approved.
- Check Registration Status: Log into your SoTrustworthy dashboard settings to view the live verification status of your A2P 10DLC brand profile.
Ask every customer for a review—without review gating.
SoTrustworthy sends a compliant, perfectly-timed review request to every customer after the job — no filtering, no gating, just more honest 5-star reviews on Google.
