> For the complete documentation index, see [llms.txt](https://docs.truecaller.com/truecaller-sdk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.truecaller.com/truecaller-sdk/android/sdk-v2.8.0-deprecating-soon/integrating-with-your-app/verifying-non-truecaller-users/completing-verification.md).

# Completing Verification

Once you receive a callback in your `VerificationCallback` instance with the requestCode `TYPE_MISSED_CALL_RECEIVED` or TYPE\_OTP\_RECEIVED , you can complete the verification process by calling the following method from within your activity :

Copy

```
TrueProfile profile = new TrueProfile.Builder(firstName, lastName).build();
```

You need to create a TrueProfile instance by passing the user's first and last name as defined above.

{% hint style="info" %}
Please note that the first name and last name values to be passed in the above method call need to follow below mentioned rules :

* The strings need to contains at least 1 alphabet, and cannot be completely comprised of numbers or special characters
* String length should be less than 128 characters
* First name is a mandatory field, last name can be empty ( but non nullable )
  {% endhint %}

Depending on whether the verification medium is **drop call** or **OTP,** you need to call one of the following methods respectively:

DropcallOTPCopy

```
TruecallerSDK.getInstance().verifyMissedCall(profile, apiCallback)
```

You need to call this method once you have received callback with requestCode as `TYPE_MISSED_CALL_RECEIVED` in your `VerificationCallback` instance

After you call the above method, you will receive a callback in your `VerificationCallback` instance with requestCode as `TYPE_VERIFICATION_COMPLETE,` which completes your verification process.

Whenever you get the verification callback with requestType as `TYPE_VERIFICATION_COMPLETE,` you would get an *accessToken* as a parameter in the *verificationDataBundle.* You can use this access token to validate the authenticity of the verification flow by making an API call from your server to Truecaller's server. For details on this part, please refer [here](/truecaller-sdk/android/sdk-v2.8.0-deprecating-soon/server-side-response-validation/for-non-truecaller-users-verification-flow.md).