# My SMS was delivered with an overwritten sender ID (Changed Originator) #### Local Restrictions Due to local restrictions the originator or sender ID of your messages could be overwritten when sending to certain countries. Generally we see that certain networks and countries can change an originator to one of the following: * A generic sender ID, such as 'INFOSMS' * A local number for the recipient's country * A local short code, such as 3546 This is out of our control, but some countries will allow you to register your sender ID to bypass this. In our [Complete list of sender ID availability and restrictions ](/connectivity-platform/country-restrictions-and-regulations/sender-id-availability-and-restrictions-per-country.md)you can check if your sender ID will be overwritten and if registration is possible. #### Sticky VMN If you are using multiple Numbers on your account, or you are using one of our shared Numbers, you will want to use the same *Sender* phone number each time a specific recipient receives an SMS from you. Sticky VMN allows you to do this and ensures a consistent and trustworthy appearance towards your customers. Our system will automatically alternate between your VMNs, making sure that you stay below the capacity limit. When sending an SMS, you will trigger our system to select a random VMN for the first SMS message which ensures that the selected VMN is reused for all following messages towards this number. As such, you may see our system selecting a different sender number than you had entered. #### Still having issues? If you are seeing issues with your sender ID and you are sure it is not due to the reasons above, please reach out to our support team for assistance via this page. Please include the following information: 1. Your [Workspace ID](/connectivity-platform/troubleshooting/where-can-i-find-my-messagebird-workspace-id.md) 2. The affected recipient numbers 3. Dates and timestamps of the SMS 4. The original sender ID and the received sender ID 5. A screenshot of the sender ID received on the device --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.bird.com/connectivity-platform/sending-sms/my-sms-was-delivered-with-an-overwritten-sender-id-changed-originator.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.