diff --git a/applications/abri/abri_trigger_request.py b/applications/abri/abri_trigger_request.py
index a41959fee..003fe47bb 100644
--- a/applications/abri/abri_trigger_request.py
+++ b/applications/abri/abri_trigger_request.py
@@ -42,10 +42,8 @@ class AbriTriggerRequest(BaseModel):
     confirmed_survey_time: Optional[str] = None
     last_submission_date: Optional[date] = None
     outcome: Optional[str] = None
-    # OpenHousing's bookable resource for the survey; required by the log
-    # and amend flows. A blank resource does not error at the relay —
-    # OpenHousing silently drops the appointment — so blank is treated as
-    # missing and fails the per-flow validation instead.
+    # OpenHousing's bookable resource for the survey; required by the log and
+    # amend flows. Empty string is also rejected by Abri, so not allowed here
     third_party_surveyor_identifier: Optional[str] = None
 
     @field_validator("third_party_surveyor_identifier")
diff --git a/domain/abri/models.py b/domain/abri/models.py
index e045ae203..f60729382 100644
--- a/domain/abri/models.py
+++ b/domain/abri/models.py
@@ -44,9 +44,6 @@ class LogJobRequest:
     appointment_time: SlotCode
     short_description: str
     long_description: str
-    # The bookable OpenHousing resource. Mandatory: a missing or blank
-    # resource does not error at the relay — OpenHousing logs the job but
-    # silently drops the appointment.
     resource: str
 
 
@@ -71,9 +68,6 @@ class AmendJobRequest:
     job_no: str
     appointment_date: date
     appointment_time: SlotCode
-    # The bookable OpenHousing resource. Mandatory: a missing or blank
-    # resource does not error at the relay — OpenHousing silently drops
-    # the appointment.
     resource: str
 
 
diff --git a/etl/hubspot/hubspot_deal_differ.py b/etl/hubspot/hubspot_deal_differ.py
index 46de2314d..30651fdf9 100644
--- a/etl/hubspot/hubspot_deal_differ.py
+++ b/etl/hubspot/hubspot_deal_differ.py
@@ -244,9 +244,7 @@ class HubspotDealDiffer:
             flows.append("abandon_job")
 
         if not flows:
-            logger.info(
-                "No Abri flows triggered for HubSpot deal %s", hubspot_deal_id
-            )
+            logger.info("No Abri flows triggered for HubSpot deal %s", hubspot_deal_id)
             return None
 
         logger.info(
@@ -267,9 +265,6 @@ class HubspotDealDiffer:
                 else None
             ),
             "confirmed_survey_time": new_deal.get("confirmed_survey_time"),
-            # Carried for the log/amend flows: sent to OpenHousing as the
-            # bookable resource. Mandatory for those flows — a deal without
-            # it fails the message contract's validation and dead-letters.
             "third_party_surveyor_identifier": new_deal.get(
                 "third_party_surveyor_identifier"
             ),