Cookies and device storage used by Sumvero
This policy explains what Sumvero stores on, or reads from, your browser or mobile device, why it is needed, and how long it normally remains. The current release uses necessary technology only and does not load analytics, advertising, profiling or cross-site tracking technology.
Version 2026-08-23
Current web technologies
| Name | Purpose | Category | Typical duration |
|---|---|---|---|
OptimusInvoicing.Auth (development) or __Host-OptimusInvoicing.Auth (production) | Keeps an authorised user signed in and carries protected workspace and role claims. | Strictly necessary | Browser session, or up to 12 hours when “keep me signed in” is selected; it can renew during activity |
.AspNetCore.Antiforgery.* | Helps prevent another site from submitting protected forms as the user. | Strictly necessary security | Normally the browser session |
OptimusInvoicing.CookiePreferences | Remembers that the essential-only notice was acknowledged. | Strictly necessary preference | 6 months |
.AspNetCore.Mvc.CookieTempDataProvider (framework-generated name may vary) | Displays a one-time success or error message after navigation. | Strictly necessary functionality | Deleted after it is read or when the session ends |
Why consent is not requested for these technologies
The technologies listed above are limited to providing a service you requested, maintaining security, authenticating users and recording your privacy choice. They are treated as strictly necessary under the applicable UK storage-and-access rules. We still describe them here so their use is transparent.
Mobile app storage
The Android and iOS source is designed to use operating-system protected storage for short-lived access credentials and a rotating device-session token. App preferences needed for display or security can also be stored on the device. Each release build and its third-party packages must be audited before the store privacy disclosures say that no tracking SDK is present.
Optional technologies
No optional analytics, marketing, behavioural advertising or cross-site tracking technology is configured in the current release. If this changes, Sumvero will update this table and preference centre, and will prevent non-exempt technology from loading until the user has made the required affirmative choice. Rejecting optional technology will be as easy as accepting it, and consent can be withdrawn later.
Your controls
You can delete site data through browser settings, but removing essential authentication storage signs you out and may prevent protected features from working. You can review or clear the acknowledgement stored by this site at any time on the cookie preferences page. A permanent Cookie preferences link is also provided in the site footer.
Changes to this policy
We will update the version date when technologies, purposes, providers or retention periods change. Where a change affects a consent choice, we will ask again before the relevant optional technology loads.
Questions can be sent to info@optimustech.co.uk.