diff --git a/resources/tester/test_est_documents.py b/resources/tester/test_est_documents.py
index 9f2ac80a8..c011b954d 100644
--- a/resources/tester/test_est_documents.py
+++ b/resources/tester/test_est_documents.py
@@ -1,6 +1,20 @@
 from test_est_rea_parity import run
 
 
+def test_custom_print_form_documents_are_saved_and_unknown_keys_rejected():
+    result = run(
+        "math",
+        """(()=>{
+      const p=EstNative.empty();p.documents={'annual-items':'stage note','progress-costs':'progress note'};
+      const valid=EstModel.validate(p).documents;let rejected=false;
+      const q=EstNative.empty();q.documents={'invalid-key':'bad'};try{EstModel.validate(q)}catch{rejected=true}
+      return {valid,rejected};
+    })()""",
+    )
+    assert result["valid"] == {"annual-items": "stage note", "progress-costs": "progress note"}
+    assert result["rejected"]
+
+
 def test_schedule_refreshes_progress_from_latest_locked_round_without_losing_dates():
     result = run(
         "math",
diff --git a/tools/est-test/PLAN.md b/tools/est-test/PLAN.md
index c1ef75e9e..186a88a9e 100644
--- a/tools/est-test/PLAN.md
+++ b/tools/est-test/PLAN.md
@@ -1,4 +1,7 @@
 ## Codex · EST 독립 테스트 앱 (2026-11-04)
+- [x] 추가 인쇄 서식의 본문 저장·미리보기·Excel 연결 보완 → 서식 문서 검증·재열기 시험.
+  - 자체 검증: 문서·Excel 시험 24개 통과, Edge에서 본문 저장·재열기·인쇄·Excel 요약 확인.
+
 - [x] 기성 회차 이름 변경·추가 시 중복 방지 → 공백·기존 이름 충돌 시험.
   - 자체 검증: 기성·업무 시험 22개 통과, Edge에서 공백 중복 이름 거부·새 이름 생성 확인.
 
diff --git a/tools/est-test/native-model.js b/tools/est-test/native-model.js
index fc0d6989d..b2b03b749 100644
--- a/tools/est-test/native-model.js
+++ b/tools/est-test/native-model.js
@@ -344,8 +344,21 @@ const EstModel = (() => {
     if (project.documents != null) {
       if (typeof project.documents !== "object" || Array.isArray(project.documents))
         throw Error("문서 본문 형식 오류");
+      const extraForms = new Set([
+        "progress-summary",
+        "progress-costs",
+        "escalation-summary",
+        "escalation-costs",
+        "annual-summary",
+        "annual-items",
+        "change-costs",
+      ]);
       for (const [key, value] of Object.entries(project.documents))
-        if (!/^(current|\d+)$/.test(key) || typeof value !== "string" || value.length > 100000)
+        if (
+          (!/^(current|\d+)$/.test(key) && !extraForms.has(key)) ||
+          typeof value !== "string" ||
+          value.length > 100000
+        )
           throw Error("문서 본문 형식 오류");
     }
     for (const key of ["quantities", "progress", "annual", "drawings", "attachments"]) {
diff --git a/tools/est-test/native-report.js b/tools/est-test/native-report.js
index 2a6633057..946d76030 100644
--- a/tools/est-test/native-report.js
+++ b/tools/est-test/native-report.js
@@ -106,7 +106,7 @@ const EstReport = (() => {
       .document-text{white-space:pre-wrap;line-height:1.7;min-height:40mm}.page{break-after:page}.page:last-child{break-after:auto}.footer{text-align:right;margin-top:3mm}
       </style></head><body><h1>${esc(state.project.name)}</h1><h2>${esc(title)}</h2>
       ${detail ? `<h2>${esc(detail)}</h2>` : ""}${totals ? `<div class="summary">순공사비 ${number(totals.direct?.TC)}원 · 도급액 ${number(totals.total)}원</div>` : ""}
-      ${paginate(root, settings)}${errors.length ? `<p class="errors">계산 오류 ${errors.length}건: ${esc(errors.join(" / "))}</p>` : ""}</body></html>`;
+      ${paginate(root, settings)}${output && settings.notes ? `<div class="document-text">${esc(settings.notes)}</div>` : ""}${errors.length ? `<p class="errors">계산 오류 ${errors.length}건: ${esc(errors.join(" / "))}</p>` : ""}</body></html>`;
     EstApp.byId("print-frame").srcdoc = source;
   }
   function paginate(root, settings) {
@@ -279,7 +279,7 @@ const EstReport = (() => {
         name: state.project.name,
         columns,
         rows,
-        detail: output.detail || "",
+        detail: [output.detail, setting().notes].filter(Boolean).join("\n"),
         errors: output.errors || [],
       }),
     });