Doc 1469/changelog (#508)

* Draft 1

* Update 2025-12-18.mdx

* Update changelog/2025/2025-12-18.mdx

Co-authored-by: ntombing <mantombingoloyi@gmail.com>

* Update changelog/2025/2025-12-18.mdx

---------

Co-authored-by: ntombing <mantombingoloyi@gmail.com>

Author: max-koro

changelog/2025/2025-12-18.mdx

@@ -0,0 +1,29 @@
+---
+title: 18 December 2025
+type: release
+---
+
+## New features
+
+🧭 We're releasing a [preview of the documentation](/preview/new-onboarding) for our new onboarding API. Built to strengthen risk assessment and regulatory compliance through improved data collection, it also delivers a [better developer experience](/preview/new-onboarding/#whats-changing) with cleaner mutations and queries, structured inputs, and typed responses. Full launch is planned for **[Q1 2026](/preview/#preview)**.
+
+## Improvements
+
+📈 The **Insights** tab on your Dashboard now includes new visualizations:
+
+- **Capital deposits**: New data improving visibility on iteration time for internal reviews.
+- **Support**: New dedicated section tracking support tickets, categorization, and SLAs.
+
+## Important update
+
+📩 Following an incident during activation of the [new white-labelled email notifications](/changelog/4-december-2025#improvements) announced on December 4, we rolled back to the previous account opening notifications within an hour. The December 18 breaking change for account membership invitations is also postponed.
+
+We plan to activate all new white-labelled notifications in **January 2026** with two weeks' notice. You'll be able to test them in Production Sandbox beforehand.
+
+Affected notifications:
+- Your account terms and conditions.
+- First transfer.
+- Request supporting documents.
+- Request supporting documents reminders.
+- Your account is opened.
+- Join your banking space.

changelog/coming-up.mdx

@@ -1,16 +1,12 @@
 :::tip Upcoming features
-[Card insurance](https://docs.swan.io/preview/card-insurance/), [Belgian IBANs](http://localhost:3000/preview/belgian-ibans) and more! Check out [Swan's public roadmap](https://swanio.notion.site/Swan-Public-Roadmap-385e4b2e91b3409786a6c8e885654a22) to see what's in the works. :rocket:
+[Card insurance](https://docs.swan.io/preview/card-insurance/), [Belgian IBANs](https://docs.swan.io/preview/belgian-ibans), and more! Check out [Swan's public roadmap](https://swanio.notion.site/Swan-Public-Roadmap-385e4b2e91b3409786a6c8e885654a22) to see what's in the works. 🚀
 :::
 
 <details>
   <summary>⚠️ **Upcoming breaking changes**</summary>
 
   <div>
 
-    🛡️ Starting **December 18**, we're introducing stricter input validation for several mutations to improve security and error handling.
-
-    📩 Starting **December 18**, the [account membership invitation](/topics/accounts/memberships/#notifications) notification will be rebranded with your project's branding (logo, accent colors). If you use a forked version of Web Banking, fetch and deploy the latest version from Swan's repository to continue receiving Swan-sent invitation emails.
-
     ⚠️ On **January 23, 2026**, the following fields will be removed from the [`accountStatement`](https://api-reference.swan.io/queries/account-statement/) and [`accountStatements`](https://api-reference.swan.io/queries/account-statements/) queries and from the [`generateAccountStatement` mutation](https://api-reference.swan.io/mutations/generate-account-statement/) response:
 
     - `fees` is replaced by `feeCredits` and `feeDebits`.