diff --git a/docs/example-lpa.json b/docs/example-lpa.json
index 171fac80..ddd82528 100644
--- a/docs/example-lpa.json
+++ b/docs/example-lpa.json
@@ -58,6 +58,7 @@
   },
   "lifeSustainingTreatmentOption": "option-a",
   "signedAt": "2024-01-10T23:00:00Z",
+  "witnessedByCertificateProviderAt": "2024-01-11T01:00:00Z",
   "certificateProviderNotRelatedConfirmedAt": "2024-01-11T22:00:00Z",
   "howAttorneysMakeDecisions": "jointly"
 }
diff --git a/docs/schemas/2024-10/donor-details.json b/docs/schemas/2024-10/donor-details.json
index 6fc15dd3..2d49ca16 100644
--- a/docs/schemas/2024-10/donor-details.json
+++ b/docs/schemas/2024-10/donor-details.json
@@ -177,6 +177,14 @@
       "type": "string",
       "format": "date-time"
     },
+    "witnessedByCertificateProviderAt": {
+      "type": "string",
+      "format": "date-time"
+    },
+    "witnessedByIndependentWitnessAt": {
+      "type": "string",
+      "format": "date-time"
+    },
     "certificateProviderNotRelatedConfirmedAt": {
       "type": "string",
       "format": "date-time"
diff --git a/internal/shared/lpa.go b/internal/shared/lpa.go
index 1d075e59..1e5bd7fb 100644
--- a/internal/shared/lpa.go
+++ b/internal/shared/lpa.go
@@ -25,6 +25,8 @@ type LpaInit struct {
 	RestrictionsAndConditions                   string                  `json:"restrictionsAndConditions,omitempty"`
 	RestrictionsAndConditionsImages             []FileUpload            `json:"restrictionsAndConditionsImages,omitempty"`
 	SignedAt                                    time.Time               `json:"signedAt"`
+	WitnessedByCertificateProviderAt            time.Time               `json:"witnessedByCertificateProviderAt"`
+	WitnessedByIndependentWitnessAt             *time.Time              `json:"witnessedByIndependentWitnessAt,omitempty"`
 	CertificateProviderNotRelatedConfirmedAt    *time.Time              `json:"certificateProviderNotRelatedConfirmedAt,omitempty"`
 }
 
diff --git a/internal/shared/lpa_test.go b/internal/shared/lpa_test.go
index 4cb2e1a2..3c582f50 100644
--- a/internal/shared/lpa_test.go
+++ b/internal/shared/lpa_test.go
@@ -13,7 +13,7 @@ func TestLpaInitMarshalJSON(t *testing.T) {
 "donor":{"uid":"","firstNames":"","lastName":"","address":{"line1":"","country":""},"dateOfBirth":"","email":"","contactLanguagePreference":""},
 "attorneys":null,
 "certificateProvider":{"uid":"","firstNames":"","lastName":"","address":{"line1":"","country":""},"email":"","phone":"","channel":""},
-"signedAt":"0001-01-01T00:00:00Z"
+"signedAt":"0001-01-01T00:00:00Z","witnessedByCertificateProviderAt":"0001-01-01T00:00:00Z"
 }`
 
 	data, _ := json.Marshal(LpaInit{})
diff --git a/lambda/create/main_test.go b/lambda/create/main_test.go
index ba995041..c99abdb9 100644
--- a/lambda/create/main_test.go
+++ b/lambda/create/main_test.go
@@ -67,8 +67,9 @@ var (
 			Phone:                     "0777777777",
 			ContactLanguagePreference: shared.LangEn,
 		},
-		WhenTheLpaCanBeUsed: shared.CanUseWhenHasCapacity,
-		SignedAt:            testNow,
+		WhenTheLpaCanBeUsed:              shared.CanUseWhenHasCapacity,
+		SignedAt:                         testNow,
+		WitnessedByCertificateProviderAt: testNow,
 	}
 )
 
diff --git a/lambda/create/validate.go b/lambda/create/validate.go
index f9bcda86..1cfe0c61 100644
--- a/lambda/create/validate.go
+++ b/lambda/create/validate.go
@@ -73,6 +73,8 @@ func Validate(lpa shared.LpaInit) []shared.FieldError {
 			validate.IsValid("/whenTheLpaCanBeUsed", lpa.WhenTheLpaCanBeUsed),
 			validate.Unset("/lifeSustainingTreatmentOption", lpa.LifeSustainingTreatmentOption))),
 		validate.Time("/signedAt", lpa.SignedAt),
+		// validate.Time("/witnessedByCertificateProviderAt", lpa.WitnessedByCertificateProviderAt),
+		// validate.OptionalTime("/witnessedByIndependentWitnessAt", lpa.WitnessedByIndependentWitnessAt),
 		validate.OptionalTime("/certificateProviderNotRelatedConfirmedAt", lpa.CertificateProviderNotRelatedConfirmedAt),
 	)
 }
diff --git a/lambda/create/validate_test.go b/lambda/create/validate_test.go
index e1fbff28..92983997 100644
--- a/lambda/create/validate_test.go
+++ b/lambda/create/validate_test.go
@@ -89,10 +89,11 @@ func makeLpaWithDonorAndActors() shared.LpaInit {
 			ContactLanguagePreference: shared.LangEn,
 			DateOfBirth:               newDate("1956-08-08"),
 		},
-		CertificateProvider: makeCertificateProvider(),
-		Attorneys:           []shared.Attorney{makeAttorney()},
-		SignedAt:            time.Now(),
-		WhenTheLpaCanBeUsed: shared.CanUseWhenHasCapacity,
+		CertificateProvider:              makeCertificateProvider(),
+		Attorneys:                        []shared.Attorney{makeAttorney()},
+		SignedAt:                         time.Now(),
+		WitnessedByCertificateProviderAt: time.Now(),
+		WhenTheLpaCanBeUsed:              shared.CanUseWhenHasCapacity,
 	}
 }
 
@@ -212,6 +213,7 @@ func TestValidateLpaInvalid(t *testing.T) {
 				{Source: "/certificateProvider/phone", Detail: "field is required"},
 				{Source: "/attorneys", Detail: "at least one attorney is required"},
 				{Source: "/signedAt", Detail: "field is required"},
+				// {Source: "/witnessedByCertificateProviderAt", Detail: "field is required"},
 			},
 		},
 		"online certificate provider missing email": {