diff --git a/app/main.py b/app/main.py
index 710eec1..e9b24d5 100644
--- a/app/main.py
+++ b/app/main.py
@@ -15,6 +15,7 @@ from sqlalchemy import text
 from .config import get_settings
 from .db import engine, Base
 from .migrations import run_migrations
+from .scheduler import start_scheduler, stop_scheduler
 from .routers import health, schemas, practices, debug, instructor, files, verbale, custom_checks, assignment, internal
 
 logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(name)s: %(message)s")
@@ -32,10 +33,12 @@ async def lifespan(app: FastAPI):
         Base.metadata.create_all(bind=engine)
         run_migrations(engine)
         log.info(f"Schema '{settings.db_schema}' + tabelle + migrations OK")
+        start_scheduler()
     except Exception as e:
         log.error(f"Errore bootstrap DB: {e}")
         raise
     yield
+    stop_scheduler()
     log.info("Shutdown rendicontazione-api")
 
 
diff --git a/app/migrations.py b/app/migrations.py
index b9c8257..9e2915a 100644
--- a/app/migrations.py
+++ b/app/migrations.py
@@ -155,9 +155,29 @@ MIGRATIONS = [
     CREATE INDEX IF NOT EXISTS idx_expiration_config_type
         ON gepafin_rendic.remission_expiration_config(type)
         WHERE is_deleted = false;
+    """,
+    # 2026-04-20 v5: dedup duplicati (ON CONFLICT DO NOTHING non funzionava senza UNIQUE)
+    # + aggiungo UNIQUE constraint per prevenire futuri duplicati
+    """
+    DELETE FROM gepafin_rendic.remission_expiration_config ec
+    USING gepafin_rendic.remission_expiration_config ec2
+    WHERE ec.id > ec2.id
+      AND ec.type = ec2.type
+      AND ec.interval_days = ec2.interval_days;
+    DO $$
+    BEGIN
+        IF NOT EXISTS (
+            SELECT 1 FROM pg_constraint
+            WHERE conname = 'uq_expiration_config_type_days'
+              AND conrelid = 'gepafin_rendic.remission_expiration_config'::regclass
+        ) THEN
+            ALTER TABLE gepafin_rendic.remission_expiration_config
+                ADD CONSTRAINT uq_expiration_config_type_days UNIQUE (type, interval_days);
+        END IF;
+    END$$;
     INSERT INTO gepafin_rendic.remission_expiration_config (type, interval_days)
     VALUES ('AMENDMENT', 7), ('AMENDMENT', 2)
-    ON CONFLICT DO NOTHING;
+    ON CONFLICT (type, interval_days) DO NOTHING;
     """,
 ]
 
diff --git a/app/routers/instructor.py b/app/routers/instructor.py
index 703de5f..fc1b1c9 100644
--- a/app/routers/instructor.py
+++ b/app/routers/instructor.py
@@ -6,12 +6,13 @@ from decimal import Decimal
 from uuid import UUID
 from typing import List
 
-from fastapi import APIRouter, Depends, HTTPException
+from fastapi import APIRouter, Depends, HTTPException, UploadFile, File
 from sqlalchemy.orm import Session
 from sqlalchemy import text, or_, and_
 
 from ..db import get_db
 from ..auth import AuthUser, get_current_user
+from ..storage import save_upload, FileTooLargeError, MimeNotAllowedError, StorageError
 from ..models import RemissionPractice, RemissionAmendmentRequest
 from ..schemas import (
     AmendmentRequestCreate, AmendmentRequestUpdate, AmendmentExtend, AmendmentRequestOut, AmendmentResponseSubmit, AmendmentStatus,
@@ -384,6 +385,59 @@ def close_amendment(practice_id: UUID, amendment_id: UUID,
                        data=AmendmentRequestOut.model_validate(ar).model_dump(mode="json"))
 
 
+@router.post("/{practice_id}/amendment/{amendment_id}/upload-document", response_model=ApiResponse)
+async def upload_amendment_document(practice_id: UUID, amendment_id: UUID,
+                                    file: UploadFile = File(...),
+                                    db: Session = Depends(get_db),
+                                    user: AuthUser = Depends(_require_instructor)):
+    """Allega documento dell'istruttore al soccorso (motivazione, scheda tecnica, ecc.).
+    Consentito in DRAFT o AWAITING. Sostituisce il precedente se esiste."""
+    ar = _amendment_or_404(db, practice_id, amendment_id)
+    if ar.status not in (AmendmentStatus.DRAFT.value, AmendmentStatus.AWAITING.value):
+        raise HTTPException(status_code=409,
+                            detail=f"Upload consentito in DRAFT/AWAITING (attuale: {ar.status})")
+    p = _get_practice_or_404(db, practice_id)
+    try:
+        rel_path, size, digest, mime, safe_name = save_upload(
+            application_id=p.application_id,
+            entity_type="amendment-instructor-doc",
+            entity_id=ar.id,
+            file_obj=file.file,
+            original_filename=file.filename or "amendment.pdf",
+            content_type=file.content_type,
+        )
+    except FileTooLargeError as e:
+        raise HTTPException(status_code=413, detail=str(e))
+    except MimeNotAllowedError as e:
+        raise HTTPException(status_code=415, detail=str(e))
+    except StorageError as e:
+        raise HTTPException(status_code=500, detail=f"Errore storage: {e}")
+
+    ar.amendment_document_path = rel_path
+    ar.amendment_document_type = mime
+    db.commit()
+    db.refresh(ar)
+    return ApiResponse(message="Documento allegato al soccorso",
+                       data={"amendment_id": str(ar.id), "path": rel_path,
+                             "filename": safe_name, "size_bytes": size, "mime": mime})
+
+
+@router.delete("/{practice_id}/amendment/{amendment_id}/upload-document", response_model=ApiResponse)
+def delete_amendment_document(practice_id: UUID, amendment_id: UUID,
+                              db: Session = Depends(get_db),
+                              user: AuthUser = Depends(_require_instructor)):
+    """Rimuove il documento istruttore allegato al soccorso (consentito solo in DRAFT)."""
+    ar = _amendment_or_404(db, practice_id, amendment_id)
+    if ar.status != AmendmentStatus.DRAFT.value:
+        raise HTTPException(status_code=409,
+                            detail=f"Rimozione allegato consentita solo in DRAFT (attuale: {ar.status})")
+    ar.amendment_document_path = None
+    ar.amendment_document_type = None
+    db.commit()
+    return ApiResponse(message="Documento allegato rimosso",
+                       data={"amendment_id": str(ar.id)})
+
+
 # Endpoint beneficiario: visualizza amendments sulla sua pratica + risponde
 @router.post("/{practice_id}/amendment/{amendment_id}/respond-beneficiary", response_model=ApiResponse)
 def respond_amendment_beneficiary(practice_id: UUID, amendment_id: UUID,
@@ -556,3 +610,44 @@ def set_instructor_final_notes(practice_id: UUID, body: InstructorFinalNotesBody
     db.refresh(p)
     return ApiResponse(message="Verbale aggiornato",
                        data=PracticeOut.model_validate(p).model_dump(mode="json"))
+
+
+@router.post("/{practice_id}/amendment/{amendment_id}/upload-response-document", response_model=ApiResponse)
+async def upload_response_document(practice_id: UUID, amendment_id: UUID,
+                                   file: UploadFile = File(...),
+                                   db: Session = Depends(get_db),
+                                   user: AuthUser = Depends(get_current_user)):
+    """Beneficiario allega un documento come supporto alla sua risposta al soccorso.
+    Consentito su amendment in stato AWAITING, solo dal proprietario pratica."""
+    p = _get_practice_or_404(db, practice_id)
+    if user.is_beneficiary() and p.user_id != user.user_id:
+        raise HTTPException(status_code=403, detail="Non sei il proprietario della pratica")
+
+    ar = _amendment_or_404(db, practice_id, amendment_id)
+    if ar.status not in (AmendmentStatus.AWAITING.value, AmendmentStatus.RESPONSE_RECEIVED.value):
+        raise HTTPException(status_code=409,
+                            detail=f"Upload risposta consentito solo in AWAITING/RESPONSE_RECEIVED (attuale: {ar.status})")
+
+    try:
+        rel_path, size, digest, mime, safe_name = save_upload(
+            application_id=p.application_id,
+            entity_type="amendment-response-doc",
+            entity_id=ar.id,
+            file_obj=file.file,
+            original_filename=file.filename or "response.pdf",
+            content_type=file.content_type,
+        )
+    except FileTooLargeError as e:
+        raise HTTPException(status_code=413, detail=str(e))
+    except MimeNotAllowedError as e:
+        raise HTTPException(status_code=415, detail=str(e))
+    except StorageError as e:
+        raise HTTPException(status_code=500, detail=f"Errore storage: {e}")
+
+    ar.response_document_path = rel_path
+    ar.response_document_type = mime
+    db.commit()
+    db.refresh(ar)
+    return ApiResponse(message="Documento risposta allegato",
+                       data={"amendment_id": str(ar.id), "path": rel_path,
+                             "filename": safe_name, "size_bytes": size, "mime": mime})
diff --git a/app/scheduler.py b/app/scheduler.py
new file mode 100644
index 0000000..8d6d8cb
--- /dev/null
+++ b/app/scheduler.py
@@ -0,0 +1,158 @@
+"""Scheduler per lifecycle amendment.
+
+Due cron job attivi:
+  - expire_amendments(): ogni giorno 01:05 — trova amendment AWAITING con
+    deadline < today, le passa a EXPIRED, rimette pratica a UNDER_REVIEW
+    se non ci sono altri amendment aperti. Equivalente a
+    ApplicationAmendmentScheduler.processAmendmentExpirationScheduler del BE.
+
+  - queue_reminders(): ogni giorno 09:00 — legge remission_expiration_config
+    (type='AMENDMENT', interval_days=N), trova amendment AWAITING con
+    deadline == today + N giorni, setta flag reminder_queued_at sul
+    record. Equivalente a ExpirationScheduler.processAmendmentExpiration
+    del BE (data-driven da expiration_config).
+
+Le notifiche effettive (PEC reminder benef + email interna istruttore) le
+invia il BE Gepafin via polling sui nostri endpoint /internal. Il
+microservizio resta sender-agnostico.
+"""
+import logging
+from datetime import datetime, timezone, date, timedelta
+from typing import Optional
+
+from apscheduler.schedulers.background import BackgroundScheduler
+from apscheduler.triggers.cron import CronTrigger
+from sqlalchemy.orm import Session
+from sqlalchemy import text
+
+from .db import SessionLocal
+from .models import RemissionAmendmentRequest, RemissionPractice, RemissionExpirationConfig
+
+log = logging.getLogger("rendicontazione-api.scheduler")
+
+
+def expire_amendments() -> dict:
+    """Espira amendment AWAITING con deadline passata.
+    Ritorna dict {expired_count, practices_reopened} per logging/test."""
+    db: Session = SessionLocal()
+    today = date.today()
+    stats = {"expired_count": 0, "practices_reopened": 0}
+    try:
+        expired_ars = db.query(RemissionAmendmentRequest).filter(
+            RemissionAmendmentRequest.status == "AWAITING",
+            RemissionAmendmentRequest.deadline < today,
+        ).all()
+
+        practice_ids_to_check = set()
+
+        for ar in expired_ars:
+            ar.status = "EXPIRED"
+            practice_ids_to_check.add(ar.practice_id)
+            stats["expired_count"] += 1
+            log.info(f"Amendment {ar.id} EXPIRED (deadline era {ar.deadline})")
+
+        db.flush()
+
+        for pid in practice_ids_to_check:
+            p = db.query(RemissionPractice).filter(RemissionPractice.id == pid).first()
+            if not p:
+                continue
+            others_open = [
+                a for a in p.amendment_requests
+                if a.status in ("DRAFT", "AWAITING", "RESPONSE_RECEIVED")
+            ]
+            if not others_open and p.status == "AWAITING_AMENDMENT":
+                p.status = "UNDER_REVIEW"
+                stats["practices_reopened"] += 1
+                log.info(f"Pratica {pid} ritornata a UNDER_REVIEW (amendment scaduto, nessun altro aperto)")
+
+        db.commit()
+        log.info(f"expire_amendments: {stats}")
+    except Exception as e:
+        db.rollback()
+        log.error(f"expire_amendments FAILED: {e}", exc_info=True)
+        raise
+    finally:
+        db.close()
+    return stats
+
+
+def queue_reminders() -> dict:
+    """Legge config data-driven, per ogni interval_days trova amendment
+    con deadline == today + N, scrive flag reminder_queued_at sull'amendment.
+    Il BE vedra questi amendment come pending-reminder via /internal.
+
+    Usiamo campo pec_retry_after come marker unificato (gia presente):
+    - NULL: nessun reminder accodato
+    - timestamp: reminder accodato in questo momento, BE invia al prossimo poll
+
+    Ritorna dict {reminders_queued_by_interval}."""
+    db: Session = SessionLocal()
+    today = date.today()
+    stats = {"reminders_queued": 0, "by_interval": {}}
+    try:
+        configs = db.query(RemissionExpirationConfig).filter(
+            RemissionExpirationConfig.type == "AMENDMENT",
+            RemissionExpirationConfig.is_deleted.is_(False),
+        ).all()
+
+        for cfg in configs:
+            target_deadline = today + timedelta(days=cfg.interval_days)
+
+            ars = db.query(RemissionAmendmentRequest).filter(
+                RemissionAmendmentRequest.status == "AWAITING",
+                RemissionAmendmentRequest.deadline == target_deadline,
+                RemissionAmendmentRequest.pec_sent_at.isnot(None),  # solo se gia inviata PEC iniziale
+                # evito di ri-accodare se gia accodato oggi
+                RemissionAmendmentRequest.pec_retry_after.is_(None),
+            ).all()
+
+            for ar in ars:
+                ar.pec_retry_after = datetime.now(timezone.utc)
+                stats["reminders_queued"] += 1
+                log.info(f"Amendment {ar.id} reminder accodato ({cfg.interval_days}gg alla scadenza)")
+
+            stats["by_interval"][cfg.interval_days] = len(ars)
+
+        db.commit()
+        log.info(f"queue_reminders: {stats}")
+    except Exception as e:
+        db.rollback()
+        log.error(f"queue_reminders FAILED: {e}", exc_info=True)
+        raise
+    finally:
+        db.close()
+    return stats
+
+
+_scheduler: Optional[BackgroundScheduler] = None
+
+
+def start_scheduler():
+    """Avvia BackgroundScheduler con i 2 cron. Chiamato in lifespan FastAPI."""
+    global _scheduler
+    if _scheduler is not None:
+        log.warning("start_scheduler chiamato due volte, skip")
+        return _scheduler
+    _scheduler = BackgroundScheduler(timezone="Europe/Rome")
+    # expire ogni notte 01:05 (dopo midnight, sicuro che today e cambiato)
+    _scheduler.add_job(
+        expire_amendments, CronTrigger(hour=1, minute=5),
+        id="expire_amendments", replace_existing=True, misfire_grace_time=3600,
+    )
+    # reminder ogni mattina 09:00
+    _scheduler.add_job(
+        queue_reminders, CronTrigger(hour=9, minute=0),
+        id="queue_reminders", replace_existing=True, misfire_grace_time=3600,
+    )
+    _scheduler.start()
+    log.info("Scheduler avviato: expire_amendments 01:05 + queue_reminders 09:00 (Europe/Rome)")
+    return _scheduler
+
+
+def stop_scheduler():
+    global _scheduler
+    if _scheduler is not None:
+        _scheduler.shutdown(wait=False)
+        _scheduler = None
+        log.info("Scheduler fermato")
diff --git a/app/storage.py b/app/storage.py
index 2e7d760..e1c8898 100644
--- a/app/storage.py
+++ b/app/storage.py
@@ -48,7 +48,7 @@ def _safe_filename(name: str, max_len: int = 120) -> str:
 
 def save_upload(
     application_id: int,
-    entity_type: str,  # invoice | ula | document
+    entity_type: str,  # invoice | ula | document | amendment-instructor-doc | amendment-response-doc
     entity_id: UUID,
     file_obj: BinaryIO,
     original_filename: str,
@@ -62,7 +62,7 @@ def save_upload(
       - mime in ALLOWED_MIMES (usa content_type del client, fallback su estensione)
       - dimensione <= MAX_SIZE_BYTES
     """
-    if entity_type not in ("invoice", "ula", "document"):
+    if entity_type not in ("invoice", "ula", "document", "amendment-instructor-doc", "amendment-response-doc"):
         raise StorageError(f"entity_type non valido: {entity_type}")
 
     safe_name = _safe_filename(original_filename)
diff --git a/requirements.txt b/requirements.txt
index 461352f..828f799 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,3 +9,4 @@ python-multipart==0.0.9
 weasyprint==61.2
 pydyf==0.10.0
 jinja2==3.1.3
+APScheduler==3.10.4