Your A2P 10DLC campaign was rejected. The email gave you an error code but almost no useful guidance. You fixed what you could and resubmitted. Rejected again. Same error code. Same vague message.
This is the most common experience in 10DLC registration today. The rejection rate for first-time submissions is high enough that most businesses expect at least one rejection cycle. Some go through three, four, or five rounds before approval.
The good news: rejection reasons are predictable, documented, and fixable. TCR's CSP API defines specific error codes for every possible rejection category. Each code tells you exactly what field or requirement needs attention. The problem is that most CPaaS dashboards hide these codes behind generic messaging like "campaign description insufficient" without showing you the underlying reason.
This guide maps every common rejection code to its exact fix, based on TCR's own API documentation and real-world approval patterns from businesses that have successfully navigated the process.
How TCR Rejections Actually Work
When you submit a brand or campaign through your provider, that provider forwards the submission to TCR's CSP API. TCR runs automated validation checks against your submission data. If any check fails, TCR returns a rejection code to your provider, who then displays a (usually simplified) error message to you.
The validation checks fall into four categories:
Field-level validation: missing or malformed required fields like EIN or business name. Cross-reference validation: your information must match external records like tax databases. Content validation: your campaign description and sample messages must meet specificity requirements. Compliance validation: your opt-in flow, privacy policy, and terms of service must meet CTIA guidelines.
Each category has its own set of error codes. Understanding which code maps to which category is the key to fixing rejections on the first attempt.
Error Code 30886: Invalid Campaign Description
This is the single most common rejection reason. It means your campaign description does not thoroughly explain the purpose of the campaign or the description does not match the use case you selected.
Why it happens: businesses write vague descriptions because they want flexibility. A description like "we send notifications to customers" covers too many possibilities. Carriers need to know exactly what message types you are sending, why the recipient receives them, and how they opted in.
The fix: rewrite your campaign description using this template.
This campaign sends {specific message type} to {specific audience} who have {specific opt-in method}. Messages include {specific examples of content}. Recipients can opt out by replying STOP. Message and data rates may apply.
For example, instead of "customer notification messages," write:
This campaign sends appointment reminder messages to dental patients who have provided their phone number during online booking or in-office check-in. Messages include the appointment date, time, provider name, and office location. Recipients can opt out by replying STOP. Message and data rates may apply.
TCR's API validates that the description field contains enough contextual detail to identify the specific use case. The validation checks for keywords related to your selected use case. If you selected the appointment reminders use case but your description never mentions appointments, you trigger error 30886.
Error Code 30893: Invalid Sample Message Use Case
Your sample messages do not match the campaign use case or are not specific enough. This error fires when TCR's automated review identifies a mismatch between what you said you would send and what your samples actually show.
Common triggers include:
Using generic marketing language in a campaign registered as transactional. Failing to include your business name in at least one sample message. Using URL shorteners in sample messages, which is explicitly prohibited. Writing hypothetical messages that do not reflect actual sending patterns.
The fix: provide three to five realistic sample messages that directly reflect the campaign description. Each sample should include your business name and show the exact format recipients will receive. If your messages include dynamic fields like customer names or appointment times, show them in brackets as templated placeholders.
Approved example for an appointment reminder campaign:
Hi {first_name}, this is a reminder of your dental appointment at {office_name} on {date} at {time}. Please call {phone_number} to reschedule if needed. Reply STOP to opt out.
Rejected example:
You have an appointment coming up. Click here for details.
The second sample fails because it does not identify the sender, does not provide specific information, and uses a generic click here link that triggers spam filters.
Error Code 30891: Invalid Website URL
The website URL provided during registration is not functioning, does not clearly represent the business, or lacks required compliance documentation.
This error has become more common since carriers began actively verifying website URLs in October 2025. The verification checks that the URL resolves, returns a 200 status code, and displays content that matches the registered business name.
The fix: verify your website is accessible from outside your network. Confirm it displays your business name prominently. Ensure your privacy policy is published and includes language about SMS messaging consent. Include terms of service that reference your messaging program.
If you are a sole proprietor without a website, this requirement presents a genuine challenge. Some providers accept professional social media profiles as alternatives, but this is not guaranteed. MyTCRPlus addresses this gap by providing carrier-friendly microsites — lightweight, compliant landing pages that satisfy the website requirement without needing a full website build.
Error Code 30896: Opt-In Error
Your opt-in message workflow is not sufficient for the campaign type, or consent documentation is inadequate. This is the second most common rejection category after campaign description issues.
TCR requires clear documentation of how recipients consent to receive messages. The opt-in flow must include:
A clear description of what the recipient is signing up for. An explicit confirmation that message and data rates may apply. Customer care contact information. Instructions on how to opt out.
The fix: document your complete opt-in flow. If recipients sign up through a web form, include the exact form language, the checkbox text, and the confirmation message they receive. If they text a keyword to opt in, document the keyword, the auto-response, and any double opt-in steps.
The FCC one-to-one consent rule that took effect January 27, 2026, adds another layer. Each seller must now obtain separate consent. Shared opt-in forms that distribute phone numbers across multiple businesses are no longer compliant. Your opt-in documentation must show that consent was given specifically to your business for the specific message types in your campaign.
Error Code 30892: Invalid Sample Message – Public URL Shorteners
Your sample messages contain URLs from public shorteners like bit.ly, tinyurl, or ow.ly. TCR explicitly prohibits these because shorteners can obscure malicious links and bypass carrier filtering.
The fix: use full domain URLs in your sample messages. If you need link tracking, use your own domain with a redirect, not a third-party shortener. For example, use https://yourbusiness.com/offer instead of https://bit.ly/3xample.
Brand Rejection: EIN or Business Name Mismatch
This rejection happens at the brand registration stage, before you even submit a campaign. TCR cross-references your submitted business name and EIN against public records. If they do not match exactly, your brand registration fails.
Common causes include:
Using a DBA or trade name instead of the legal business name. Typographical errors in the EIN. Submitting an EIN that is fewer than 15 days old. Using an SSN instead of an EIN (sole proprietors now require EIN for new registrations as of 2025).
The fix: pull your EIN confirmation letter from the IRS. Copy the business name exactly as it appears on the letter. If you operate under a DBA, register the brand under the legal entity name first, then indicate the DBA in the optional brand fields.
Do not guess. An exact character match is required. Even a missing period or an Inc. versus Incorporated discrepancy can trigger rejection.
Brand Rejection: Authentication+ Verification Failure
Introduced in August 2025, Authentication+ is an additional verification tier for public companies. It costs $12.50 and requires a verification email to be sent to a trusted employee of the registered entity. That employee must click a link, enter their name and title, and confirm the PIN code.
The rejection happens when the verification email is not completed within the required window, or when the employee information does not match the brand registration.
The fix: ensure the verification email address belongs to a real employee with a verifiable role at the company. Inform them before submitting so they expect the email. Complete the process within the two-hour window before the link expires. TCR sends only one verification email per address in a two-hour window to avoid being flagged as spam.
Campaign Rejection: Reseller ID Missing
If you are a platform, agency, or SaaS provider registering campaigns on behalf of clients, you must include a Reseller ID in your submission. This requirement became mandatory in 2025.
The rejection occurs when TCR detects that the registered brand does not match the entity doing the actual sending.
The fix: obtain a Reseller ID through your provider before submitting campaigns for clients. Include it in the reseller field of the campaign registration. If you are not acting as a reseller, ensure your campaign clearly shows that your brand matches your sending entity.
The Automated Validation Approach
Every one of these rejection reasons is detectable before submission. TCR's CSP API exposes the same validation rules that trigger rejections. You do not need to wait for a rejection to know whether your submission passes.
MyTCRPlus's pre-flight diagnostics run validation checks against all seven rejection categories before you submit. The platform checks:
EIN and business name matching against public records. Campaign description completeness and use case alignment. Sample message formatting and compliance. Website URL accessibility and privacy policy presence. Opt-in flow documentation completeness. URL shortener detection in sample messages. Authentication+ and Reseller ID requirements based on brand type.
Each check produces a detailed report showing exactly what passes, what fails, and what needs attention. The output maps directly to TCR's error code system, so you know which error codes you would trigger before you trigger them.
Building a Registration That Stays Approved
Getting approved once is not the end. Carriers monitor your traffic after approval. High opt-out rates, spam complaints, or sudden volume spikes can trigger post-approval suspension.
To stay compliant after approval:
Monitor your opt-out rate. If recipients are replying STOP at high rates, review your messaging frequency and content. Keep your opt-in documentation current. If your sign-up process changes, update your campaign. Stay within your throughput limits. Sole proprietors on T-Mobile are capped at 1,000 messages per day. AT&T enforces per-minute limits at the campaign level. Review carrier policies quarterly. Requirements change. The 2025-2026 cycle introduced more changes than the previous three years combined.
Conclusion
Every A2P 10DLC rejection has a specific cause and a specific fix. The error codes are not arbitrary. They map to defined validation rules in TCR's CSP API. Understanding those rules eliminates the guesswork.
The seven rejection categories covered here account for more than 90% of all campaign registration failures. Fix these, and you eliminate the most common reasons for the rejection cycle that drives businesses toward expensive priority services.
You do not need to pay for Fast Track or premium support. You need pre-submission validation that catches errors before they become rejections. MyTCRPlus provides exactly that — the same validation TCR's API performs, run on your submission before it ever leaves your hands.
One submission. One approval. No rejection cycle.
References
TCR CSP Registry API v2 documentation: error code definitions for brand and campaign validation, including codes 30886, 30893, 30891, 30896, and 30892. Twilio Help Center: A2P 10DLC Campaign Registration Rejection reasons and resubmission guidelines. Twilio API documentation: error codes 30886 through 30896 with detailed correction instructions. Infobip 10DLC registration documentation: brand and campaign registration workflow. Plivo 10DLC API documentation: registration process and pricing breakdown including Authentication Plus fees. Apten AI analysis: 2025-2026 A2P 10DLC regulatory changes including Reseller ID mandate and EIN requirements for sole proprietors. Bandwidth 10DLC FAQ: carrier suspension policies and post-approval compliance requirements. Conduit Hospitality: A2P 10DLC registration guide covering Authentication+ and FCC one-to-one consent rule effects.