# Sender ID Verifications

A Sender ID Verification confirms that a business and its messaging use case
meet the requirements for sending application-to-person (A2P) SMS with a
specific Sender ID type.

Depending on the verification type, it can cover an Alphanumeric Sender ID,
Long-code or Toll-Free DID numbers, or messages that use a dynamic Sender ID
assigned by the destination carrier.

After approval, the covered Sender IDs can be used to send messages that match
the approved business, destination countries, and messaging purpose. For a
Carrier verification, the approval applies to the messages because the
destination carrier assigns the Sender ID.

Messages must be sent through the outbound SMS trunk associated with the
verification. Requirements, review times, and charges vary by verification
type and country.

## Key features

- Verify a business or brand name for use as an Alphanumeric Sender ID.
- Verify supported Long-code and Toll-Free DID numbers for A2P SMS.
- Verify messages that use a dynamic Sender ID assigned by the destination carrier.
- Receive replies using Long-code or Toll-Free Sender IDs where two-way messaging is supported.
- Send messages that match an active verification through an associated outbound SMS trunk.

## Get started

**How Sender ID Verification works**

Understand Sender IDs, verification, SMS trunk relationships, lifecycle, and billing.

[How Sender ID Verification works](how-sender-id-verification-works.html)

**Sender ID types**

Compare Alphanumeric, Long-code, Toll-Free, and Carrier Sender IDs.

[Sender ID types](sender-id-verification-types/index.html)

**Compliance content requirements**

Prepare compliant message content, consent flows, and opt-out methods.

[A2P SMS compliance requirements](compliance-content-requirements.html)

**How-to guides**

Create, edit, resubmit, use, and cancel Sender ID Verifications.

[How-to guides](how-to-guides/index.html)

## Related resources

**Sender ID Verification reference**

Look up filters, fields, verification types, status values, and use-case values.

[Sender ID Verification reference](sender-id-verification-reference.html)

**SMS trunks**

Create and manage trunks for inbound and outbound SMS.

[SMS Trunks](../sms-trunks/index.html)

**My Numbers**

Review SMS-enabled DID numbers and their assigned services.

[My Numbers](../../phone-numbers/my-numbers/index.html)

**Buy numbers**

Purchase DID numbers with the features required for your messaging setup.

[Buy numbers](../../phone-numbers/buy-numbers/index.html)

**Identities & Addresses**

Create and manage business identity and address records.

[Identities & Addresses](../../identities/index.html)

**SMS Logs**

Review outbound message activity and delivery information.

[SMS Logs](../../logs-analytics/sms-logs/index.html)

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