diff --git a/backend/elena_app.py b/backend/elena_app.py
index 72e2007..1999786 100644
--- a/backend/elena_app.py
+++ b/backend/elena_app.py
@@ -117,6 +117,19 @@ def init_db():
         created_at TEXT,
         FOREIGN KEY(project_id) REFERENCES projects(id)
     );
+    CREATE TABLE IF NOT EXISTS acceptances (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        project_id INTEGER NOT NULL,
+        doc TEXT NOT NULL,           -- 'offer' | 'pep' | 'pdn'
+        doc_version TEXT NOT NULL,
+        doc_hash TEXT NOT NULL,      -- SHA-256 текста документа (что подписано)
+        identifier TEXT,             -- телефон/email подписанта
+        code TEXT,                   -- код подтверждения
+        ip TEXT,
+        user_agent TEXT,
+        payment_id TEXT,             -- акцепт оплатой
+        accepted_at TEXT NOT NULL    -- append-only, не редактируется
+    );
     """)
     con.commit()
     con.close()
@@ -631,6 +644,56 @@ def update_crm():
     save_artifact(proj["id"], "crm", crm)
     return jsonify({"ok": True, "crm": crm})
 
+import hashlib
+
+# Версии и тексты юридических документов (хеш фиксируется при акцепте)
+LEGAL_DOCS = {"offer": "1.0", "pep": "1.0", "pdn": "1.0"}
+def _doc_hash(doc):
+    """SHA-256 текста документа — для доказательства что подписано."""
+    path = os.path.join(BASE, "legal", {"offer": "dogovor_oferta.md", "pep": "soglashenie_pep.md", "pdn": "politika_pdn.md"}.get(doc, ""))
+    try:
+        return hashlib.sha256(open(path, "rb").read()).hexdigest()
+    except Exception:
+        return ""
+
+@app.route("/api/accept", methods=["POST"])
+def accept_documents():
+    """Фиксация акцепта (ПЭП) в append-only журнал с хешем документов."""
+    data = request.get_json(force=True) or {}
+    proj = get_project(data.get("token"))
+    if not proj:
+        return jsonify({"error": "project not found"}), 404
+    docs = data.get("docs", ["offer", "pep"])  # какие документы акцептованы
+    identifier = data.get("identifier", "")     # телефон/email
+    code = data.get("code", "")
+    payment_id = data.get("payment_id", "")
+    ip = request.headers.get("X-Real-IP") or request.headers.get("X-Forwarded-For", request.remote_addr or "")
+    ua = request.headers.get("User-Agent", "")[:300]
+    con = db()
+    recorded = []
+    for doc in docs:
+        if doc not in LEGAL_DOCS:
+            continue
+        h = _doc_hash(doc)
+        con.execute(
+            "INSERT INTO acceptances (project_id, doc, doc_version, doc_hash, identifier, code, ip, user_agent, payment_id, accepted_at) VALUES (?,?,?,?,?,?,?,?,?,?)",
+            (proj["id"], doc, LEGAL_DOCS[doc], h, identifier, code, ip, ua, payment_id, now())
+        )
+        recorded.append({"doc": doc, "version": LEGAL_DOCS[doc], "hash": h[:16] + "..."})
+    con.commit()
+    return jsonify({"ok": True, "accepted": recorded, "at": now()})
+
+@app.route("/api/acceptances/<token>")
+def get_acceptances(token):
+    """Выписка из журнала акцептов (доказательная база)."""
+    proj = get_project(token)
+    if not proj:
+        return jsonify({"error": "not found"}), 404
+    rows = db().execute(
+        "SELECT doc, doc_version, doc_hash, identifier, code, ip, payment_id, accepted_at FROM acceptances WHERE project_id=? ORDER BY id", (proj["id"],)
+    ).fetchall()
+    return jsonify({"acceptances": [dict(r) for r in rows]})
+
 @app.route("/api/payment/create", methods=["POST"])
 def payment_create():
     """Создаёт платёж. method: card | sbp | cash."""