diff --git a/app/models/ect_at_school_period.rb b/app/models/ect_at_school_period.rb
index bd840d94..7ba35a49 100644
--- a/app/models/ect_at_school_period.rb
+++ b/app/models/ect_at_school_period.rb
@@ -11,6 +11,10 @@ class ECTAtSchoolPeriod < ApplicationRecord
   has_many :events
 
   # Validations
+  validates :email,
+            notify_email: true,
+            allow_nil: true
+
   validates :started_on,
             presence: true
 
diff --git a/app/models/mentor_at_school_period.rb b/app/models/mentor_at_school_period.rb
index b751493b..22a9b446 100644
--- a/app/models/mentor_at_school_period.rb
+++ b/app/models/mentor_at_school_period.rb
@@ -9,6 +9,10 @@ class MentorAtSchoolPeriod < ApplicationRecord
   has_many :events
 
   # Validations
+  validates :email,
+            notify_email: true,
+            allow_nil: true
+
   validates :started_on,
             presence: true
 
diff --git a/spec/models/ect_at_school_period_spec.rb b/spec/models/ect_at_school_period_spec.rb
index 19ba0c1a..e3ac715c 100644
--- a/spec/models/ect_at_school_period_spec.rb
+++ b/spec/models/ect_at_school_period_spec.rb
@@ -15,6 +15,12 @@
     it { is_expected.to validate_presence_of(:school_id) }
     it { is_expected.to validate_presence_of(:teacher_id) }
 
+    context "email" do
+      it { is_expected.to allow_value(nil).for(:email) }
+      it { is_expected.to allow_value("test@example.com").for(:email) }
+      it { is_expected.not_to allow_value("invalid_email").for(:email) }
+    end
+
     context "teacher distinct period" do
       context "when the period has not finished yet" do
         context "when the teacher has a sibling ect_at_school_period starting later" do
diff --git a/spec/models/mentor_at_school_period_spec.rb b/spec/models/mentor_at_school_period_spec.rb
index 1d6a64b1..65f7a661 100644
--- a/spec/models/mentor_at_school_period_spec.rb
+++ b/spec/models/mentor_at_school_period_spec.rb
@@ -14,6 +14,12 @@
     it { is_expected.to validate_presence_of(:school_id) }
     it { is_expected.to validate_presence_of(:teacher_id) }
 
+    context "email" do
+      it { is_expected.to allow_value(nil).for(:email) }
+      it { is_expected.to allow_value("test@example.com").for(:email) }
+      it { is_expected.not_to allow_value("invalid_email").for(:email) }
+    end
+
     context "teacher school distinct period" do
       context "when the period has not finished yet" do
         context "when the teacher has a school sibling mentor_at_school_period starting later" do