diff --git a/services/ingestion/app/audit_export_log.py b/services/ingestion/app/audit_export_log.py
index e94d5aeb6..4b8aa1f8c 100644
--- a/services/ingestion/app/audit_export_log.py
+++ b/services/ingestion/app/audit_export_log.py
@@ -226,7 +226,7 @@ def _get_verification_fallback(tenant_id: str, limit: int) -> list[dict]:
 
     # Pull from the chain_verification_job in-memory store
     try:
-        from app.chain_verification_job import _verification_jobs, _verification_lock
+        from .chain_verification_job import _verification_jobs, _verification_lock
 
         with _verification_lock:
             for job_id, job in _verification_jobs.items():
diff --git a/services/ingestion/app/labels/gs1_128.py b/services/ingestion/app/labels/gs1_128.py
index b505b5e8e..e3bb9721a 100644
--- a/services/ingestion/app/labels/gs1_128.py
+++ b/services/ingestion/app/labels/gs1_128.py
@@ -11,7 +11,7 @@
 from dataclasses import dataclass
 from typing import Any
 
-from app.gs1_identifiers import validate_gln, validate_gtin, validate_sscc
+from ..gs1_identifiers import validate_gln, validate_gtin, validate_sscc
 
 # Code 128 symbol values (ISO/IEC 15417). Not identifier data.
 _START_C = 105
diff --git a/services/ingestion/app/stripe_billing/rate_limiting.py b/services/ingestion/app/stripe_billing/rate_limiting.py
index a69b495e0..e3997730a 100644
--- a/services/ingestion/app/stripe_billing/rate_limiting.py
+++ b/services/ingestion/app/stripe_billing/rate_limiting.py
@@ -122,7 +122,7 @@ def _get_redis():
         return _redis_client
     try:
         import redis as redis_lib
-        from app.config import get_settings
+        from ..config import get_settings
 
         settings = get_settings()
         _redis_client = redis_lib.from_url(
diff --git a/services/ingestion/tests/test_no_absolute_app_imports.py b/services/ingestion/tests/test_no_absolute_app_imports.py
new file mode 100644
index 000000000..0ff1f976a
--- /dev/null
+++ b/services/ingestion/tests/test_no_absolute_app_imports.py
@@ -0,0 +1,55 @@
+"""Ingestion code must import its own modules relatively.
+
+The consolidated server (``server/main.py``) puts every service directory on
+``sys.path``, and each service ships a top-level package named ``app``. Only
+one of them wins (currently ``services/graph/app``), so inside the production
+image an absolute ``from app.X import ...`` in ingestion either raises
+``ModuleNotFoundError`` or, worse, silently loads another service's ``app.X``
+(``app.config`` resolved to graph's ``Settings``, which has no ``redis_url``).
+Unit tests put ``services/ingestion`` first on the path and never see it.
+"""
+
+from __future__ import annotations
+
+import ast
+from pathlib import Path
+
+INGESTION_APP = Path(__file__).resolve().parent.parent / "app"
+
+# Absolute imports that open PRs already remove. Delete an entry once its fix
+# lands; never add one.
+PENDING_ELSEWHERE = {
+    ("webhook_compat.py", "app.tenant_validation"),  # PR #3774
+    ("edi_ingestion/routes.py", "app.edi_ingestion.rejection_log"),  # fix/csv-edi-ingest-monolith-imports
+}
+
+
+def _absolute_app_imports(path: Path) -> list[tuple[int, str]]:
+    found: list[tuple[int, str]] = []
+    for node in ast.walk(ast.parse(path.read_text(encoding="utf-8"))):
+        if isinstance(node, ast.ImportFrom) and node.level == 0 and node.module:
+            names = [node.module]
+        elif isinstance(node, ast.Import):
+            names = [alias.name for alias in node.names]
+        elif (
+            isinstance(node, ast.Call)
+            and getattr(node.func, "attr", getattr(node.func, "id", None)) == "import_module"
+            and node.args
+            and isinstance(node.args[0], ast.Constant)
+            and isinstance(node.args[0].value, str)
+        ):
+            names = [node.args[0].value]
+        else:
+            continue
+        found.extend((node.lineno, name) for name in names if name == "app" or name.startswith("app."))
+    return found
+
+
+def test_ingestion_app_has_no_new_absolute_app_imports() -> None:
+    offenders = [
+        f"{path.relative_to(INGESTION_APP).as_posix()}:{lineno} imports {module}"
+        for path in sorted(INGESTION_APP.rglob("*.py"))
+        for lineno, module in _absolute_app_imports(path)
+        if (path.relative_to(INGESTION_APP).as_posix(), module) not in PENDING_ELSEWHERE
+    ]
+    assert offenders == [], "use a relative import (from .x / from ..x):\n" + "\n".join(offenders)