diff --git a/android-app/app/src/main/java/com/korexlabs/dhinspeccion/data/FieldFindingsMobile.kt b/android-app/app/src/main/java/com/korexlabs/dhinspeccion/data/FieldFindingsMobile.kt
index 8523801..6690364 100644
--- a/android-app/app/src/main/java/com/korexlabs/dhinspeccion/data/FieldFindingsMobile.kt
+++ b/android-app/app/src/main/java/com/korexlabs/dhinspeccion/data/FieldFindingsMobile.kt
@@ -22,6 +22,7 @@ import retrofit2.http.Multipart
 import retrofit2.http.POST
 import retrofit2.http.Part
 import retrofit2.http.Path
+import retrofit2.http.Query
 import java.io.File
 import java.time.Instant
 
@@ -100,12 +101,15 @@ data class FieldFindingEvidenceListResponse(
 data class FieldFindingOptionsResponse(
     val act: FieldFindingAct,
     val capture: CaptureStatus = CaptureStatus(),
+    val assetIncludedInAct: Boolean = true,
     val catalog: FieldFindingCatalog,
     val findings: List<FieldFindingItem> = emptyList(),
     val canAddAnother: Boolean = true,
+    val actSelectionMode: String = "EXPLICIT",
 )
 
 data class CreateFieldFindingRequest(
+    val actId: String,
     val catalogItemId: String? = null,
     val customTitle: String? = null,
     val customLegalBasis: String? = null,
@@ -119,6 +123,7 @@ data class FieldFindingCreateResponse(
     val capture: CaptureStatus = CaptureStatus(),
     val finding: FieldFindingItem,
     val canAddAnother: Boolean = true,
+    val actSelectionMode: String = "EXPLICIT",
 )
 
 private interface FieldFindingsApi {
@@ -127,6 +132,7 @@ private interface FieldFindingsApi {
         @Header("Authorization") authorization: String,
         @Path("visitId") visitId: String,
         @Path("assetId") assetId: String,
+        @Query("actId") actId: String,
     ): FieldFindingOptionsResponse
 
     @POST("inspection-visits/{visitId}/field-findings/{assetId}")
@@ -166,7 +172,7 @@ private interface FieldFindingsApi {
 
 /**
  * Cliente de campo para Hallazgos y sus evidencias append-only.
- * Comparte el almacén cifrado de sesión y nunca persiste la contraseña.
+ * F3.2 exige que la APK identifique explícitamente el Acta activa.
  */
 class FieldFindingsRepository(context: Context) {
     private val store = SecureSessionStore(context.applicationContext)
@@ -179,9 +185,9 @@ class FieldFindingsRepository(context: Context) {
         .build()
         .create(FieldFindingsApi::class.java)
 
-    suspend fun options(visitId: String, assetId: String): FieldFindingOptionsResponse =
+    suspend fun options(visitId: String, assetId: String, actId: String): FieldFindingOptionsResponse =
         authorized { session ->
-            api.options("Bearer ${session.accessToken}", visitId, assetId)
+            api.options("Bearer ${session.accessToken}", visitId, assetId, actId)
         }
 
     suspend fun create(