Cookies
Cookies are files saved on your phone, tablet or computer that collect information about how you browse the service and are used to:
- measure how you use the service so it can be improved
- remember notifications you’ve seen so you’re not shown them again
Cookies that are strictly necessary
These cookies are essential to make this service run and to help us stay in line with data protection laws. You cannot turn these cookies off.
Introductory cookie message
You may see a pop-up welcome message when you first visit. A cookie is stored so that your computer knows you’ve seen it and knows not to show it again.
| Name | Purpose | Expires |
|---|---|---|
| cookie_policy | Lets us know you’ve seen our cookie message | 12 months |
| seen_cookie_message | Lets us know you’ve seen our cookie message | 12 months |
Essential cookies
| Name | Purpose | Expires |
|---|---|---|
| cookieChallenge | Lets us know that you’ve been asked about cookies | Never |
| crumb | Helps to prevent unauthorised requests | On closing browser |
| idm | Lets us know that you’ve logged in or registered | 3 days |
| _interaction | Allows us to identify you as an individual user in our applications | 3 days |
| _interaction.sig | Allows us to identify you as an individual user in our applications | 3 days |
| session | Stores information that you’ve submitted | 3 days |
Azure Active Directory B2C cookies
| Name | Purpose | Expires |
|---|---|---|
| x-ms-cpim-admin | Holds user membership data across tenants | On closing browser |
| x-ms-cpim-slice | Used to route requests to the appropriate production instance | On closing browser |
| x-ms-cpim-trans | Used for tracking the transactions and the current transaction | On closing browser |
| x-ms-cpim-sso:{Id} | Used for maintaining the SSO session | On closing browser |
| x-ms-cpim-cache:{id}_n | Used for maintaining the request state, successful authentication | On closing browser |
| x-ms-cpim-csrf | Cross-Site Request Forgery token used for CRSF protection | On closing browser |
| x-ms-cpim-dc | Used for Azure AD B2C network routing | On closing browser |
| x-ms-cpim-ctx | Context | On closing browser |
| x-ms-cpim-rp | Used for storing membership data for the resource provider tenant | On closing browser |
| x-ms-cpim-csrf | Used for storing the relay cookie | On closing browser |
Government services
Most services we link to are run by different government departments, for example HM Revenue and Customs (HMRC) or the Home Office. These services may set other cookies and, if so, will have their own cookies policy.
This was last updated on 21 April 2023