# Movement Reference Number (MRN)

### What is MRN?

The [**Movement Reference Number**](https://www.icustoms.ai/blogs/mrn-number-on-cds/) **(MRN)** is a unique 18-character code assigned to each import/export declaration. It helps businesses and customs track shipments seamlessly, making the customs process faster and more efficient.

### Why Does MRN Matter?

* **Faster Customs Clearance**: MRN electronically connects your goods to customs, reducing delays.
    
* **Tax Suspension**: You can defer import taxes until goods reach their final destination.
    
* **Error-Free Documentation**: Each declaration gets its own MRN, reducing the risk of errors in customs control.
    

### MRN with CDS

With the [**Customs Declaration Service**](https://www.icustoms.ai/blogs/features-of-custom-declaration-service-you-are-looking-for/) **(CDS)** now replacing CHIEF, the MRN is crucial for tracking and processing shipments. It’s automatically generated, ensuring your goods are cleared and tracked efficiently.