diff --git a/docs/evidence/rev004-accounting/late-fee-start-and-daily-recalculation-2026-06-30.md b/docs/evidence/rev004-accounting/late-fee-start-and-daily-recalculation-2026-06-30.md
index fd01087..f7d655b 100644
--- a/docs/evidence/rev004-accounting/late-fee-start-and-daily-recalculation-2026-06-30.md
+++ b/docs/evidence/rev004-accounting/late-fee-start-and-daily-recalculation-2026-06-30.md
@@ -18,6 +18,7 @@
 - `af05601f1 fix: harden late fee recalculation batch`
 - `3722c54fa fix: paginate late fee recalculation batches`
 - `d551dba84 fix: handle late fee reversal and batch transactions`
+- `bcc635e81 fix: guard late fee recalculation updates`
 
 ## Implemented Files
 
@@ -36,6 +37,7 @@
 - `sw-business/sw-business-server/src/main/java/cn/com/emsoft/sw/business/dal/mysql/latefeereducedetail/LateFeeReduceDetailMapper.java`
 - `sw-business/sw-business-server/src/main/java/cn/com/emsoft/sw/business/service/charge/ChargeServiceImpl.java`
 - `script/xxl-job-init.sql`
+- `sql/rev004/REV004_late_fee_daily_recalculation_index.sql`
 - Unit tests under `sw-business/sw-business-server/src/test/java/cn/com/emsoft/sw/business/service/charge/latefee/`
 - `sw-business/sw-business-server/src/test/java/cn/com/emsoft/sw/business/service/charge/ChargeLateFeeBeginDateWiringTest.java`
 - `sw-business/sw-business-server/src/test/java/cn/com/emsoft/sw/business/service/accountingadjust/pricediff/PriceDiffWriteBackServiceTest.java`
@@ -51,6 +53,9 @@
 - Focused tests now cover the shared begin-date apply service, keyset pagination across batches, and direct insert path wiring for counter add-reading and special billing.
 - Price-diff write-back now applies missing `lateFeeBeginDate` before inserting the replacement unpaid charge.
 - Daily recalculation now keeps the outer pagination loop non-transactional and executes each page through `LateFeeRecalculationBatchService.recalculateBatch(...)` with its own transaction boundary.
+- Daily recalculation now updates `lateFee` through a conditional mapper update that still requires `payState=UNPAID` and non-null `lateFeeBeginDate`, so a charge paid after selection is not overwritten or counted.
+- `LateFeeDailyCalculator` ignores non-positive penalty coefficients defensively.
+- `REV004_late_fee_daily_recalculation_index.sql` adds `idx_biz_charge_late_fee_recalc` on `(tenant_id, pay_state, id)` for the tenant-scoped unpaid keyset scan.
 
 ## Verification
 
@@ -65,15 +70,15 @@ mvn -pl sw-business/sw-business-server -am -Dtest=LateFeeBeginDateCalculatorTest
 Result: PASS
 
 - `LateFeeBeginDateApplyServiceTest`: 2 tests, 0 failures, 0 errors, 0 skipped
-- `LateFeeRecalculationServiceTest`: 7 tests, 0 failures, 0 errors, 0 skipped
+- `LateFeeRecalculationServiceTest`: 8 tests, 0 failures, 0 errors, 0 skipped
 - `LateFeeConfigResolverTest`: 3 tests, 0 failures, 0 errors, 0 skipped
 - `LateFeeBeginDateCalculatorTest`: 7 tests, 0 failures, 0 errors, 0 skipped
-- `LateFeeDailyCalculatorTest`: 8 tests, 0 failures, 0 errors, 0 skipped
+- `LateFeeDailyCalculatorTest`: 9 tests, 0 failures, 0 errors, 0 skipped
 - `ChargeLateFeeBeginDateWiringTest`: 5 tests, 0 failures, 0 errors, 0 skipped
 - `PriceDiffWriteBackServiceTest`: 1 test, 0 failures, 0 errors, 0 skipped
 - `CounterAddReadingApplicationServiceImplTest`: 24 tests, 0 failures, 0 errors, 0 skipped
 - `SpecialBillingServiceImplTest`: 4 tests, 0 failures, 0 errors, 0 skipped
-- Total: 61 tests, 0 failures, 0 errors, 0 skipped
+- Total: 63 tests, 0 failures, 0 errors, 0 skipped
 
 ### Existing Accounting Regression Tests