diff --git a/docs/work-orders/board-search-api.md b/docs/work-orders/board-search-api.md
index 14323dd0..fde9438b 100644
--- a/docs/work-orders/board-search-api.md
+++ b/docs/work-orders/board-search-api.md
@@ -36,26 +36,27 @@ Paths no FE: `API_PATHS.workOrder.board`, `boardSearch`, `lookupsDispatchers`.
 | —               | `weekEnd`              | `weekStart + 4` (sexta)                                     |
 | `dispatcherIds` | `dispatchers`          | `__unassigned` → `__unassigned__`                           |
 | "My WOs"        | `dispatchers={userId}` | Equivalente a `myWorkOrders=true`                           |
-| `typeFilter`    | `types`                | PM=2, Emergency=3, Reactive=6, Add-On=7, **Overdue=99**     |
+| `typeFilter`    | `types` / `overdue`    | Tipos reais em `types`; past-due via `overdue=true` (OR)    |
 
 ## Advanced → `GET /board/search`
 
-| FE state         | API param             | Regra                                      |
-| ---------------- | --------------------- | ------------------------------------------ |
-| `page`           | `page`                | **0-based** (primeira página = `0`)        |
-| `pageSize`       | `pageSize`            | Default `100`, max `100`                   |
-| `sortBy`         | `sortBy`              | `scheduledDate` \| `woNumber` \| `dueDate` |
-| `sortDir`        | `sortDir`             | `asc` \| `desc`                            |
-| `search`         | `search`              | `>= 2` chars                               |
-| `dateRange`      | `datePreset`          | PascalCase (ver abaixo)                    |
-| `customFrom/To`  | `dateFrom` / `dateTo` | Obrigatórios se `datePreset=Custom`        |
-| `sites` (IDs UI) | `sites`               | **Site codes**, não location ID            |
-| `types`          | `types`               | Integers; Overdue → `99`                   |
-| `dispatchers`    | `dispatchers`         | `__unassigned` → `__unassigned__`          |
-| `statuses`       | `statuses`            | Integers 1–10                              |
-| `pmTypes`        | `pmTypes`             | Strings (labels Problem dropdown)          |
-| `vendorTechs`    | `vendorIds`           | Integers (resolvidos por companyName)      |
-| `docs`           | `docStatuses`         | No=2, Yes=1, NN=3                          |
+| FE state         | API param             | Regra                                       |
+| ---------------- | --------------------- | ------------------------------------------- |
+| `page`           | `page`                | **0-based** (primeira página = `0`)         |
+| `pageSize`       | `pageSize`            | Default `100`, max `100`                    |
+| `sortBy`         | `sortBy`              | `scheduledDate` \| `woNumber` \| `dueDate`  |
+| `sortDir`        | `sortDir`             | `asc` \| `desc`                             |
+| `search`         | `search`              | `>= 2` chars                                |
+| `dateRange`      | `datePreset`          | PascalCase (ver abaixo)                     |
+| `customFrom/To`  | `dateFrom` / `dateTo` | Obrigatórios se `datePreset=Custom`         |
+| `sites` (IDs UI) | `sites`               | **Site codes**, não location ID             |
+| `types`          | `types`               | Integers de `WorkOrderType` reais           |
+| overdue (UI)     | `overdue`             | `true` = past-due (`isPastDue`); ver abaixo |
+| `dispatchers`    | `dispatchers`         | `__unassigned` → `__unassigned__`           |
+| `statuses`       | `statuses`            | Integers 1–10                               |
+| `pmTypes`        | `pmTypes`             | Strings (labels Problem dropdown)           |
+| `vendorTechs`    | `vendorIds`           | Integers (resolvidos por companyName)       |
+| `docs`           | `docStatuses`         | No=2, Yes=1, NN=3                           |
 
 ### `datePreset`
 
@@ -69,15 +70,31 @@ Paths no FE: `API_PATHS.workOrder.board`, `boardSearch`, `lookupsDispatchers`.
 | `next-month`    | `NextMonth`   |
 | `custom`        | `Custom`      |
 
-### `types` — WorkOrderType / overdue
+### `types` — WorkOrderType
 
-| Label FE  | API                       |
-| --------- | ------------------------- |
-| PM        | `2`                       |
-| Emergency | `3`                       |
-| Reactive  | `6`                       |
-| Add-On    | `7`                       |
-| Overdue   | `99` (filtra `isPastDue`) |
+Somente tipos reais de work order. **Não** use sentinel `99` para overdue.
+
+| Label FE  | API                                          |
+| --------- | -------------------------------------------- |
+| PM        | `2`                                          |
+| Emergency | `3`                                          |
+| Reactive  | `6`                                          |
+| Add-On    | `7`                                          |
+| Other     | tipo real do enum (não é filtro de past-due) |
+
+### `overdue` — past-due
+
+| FE / UI | API param      | Regra                                     |
+| ------- | -------------- | ----------------------------------------- |
+| Overdue | `overdue=true` | Filtra work orders past-due (`isPastDue`) |
+
+`types` e `overdue` combinam com **OR**: uma WO entra no resultado se corresponder a algum `types` **ou** estiver overdue (quando `overdue=true`).
+
+Exemplos:
+
+- Só PM e Emergency: `types=2&types=3`
+- Só past-due: `overdue=true`
+- PM **ou** past-due: `types=2&overdue=true`
 
 ### `statuses` — LifecycleStatus