diff --git a/app/models/bulk_search.rb b/app/models/bulk_search.rb
index c6a7bac6..4080d886 100644
--- a/app/models/bulk_search.rb
+++ b/app/models/bulk_search.rb
@@ -18,9 +18,9 @@ def call
 
   def not_found
     @not_found ||= csv.map { |row|
-      next if results.any? { |teacher| teacher.trn == row["TRN"] }
+      next if results.any? { |teacher| teacher.trn == sanitise_trn(row["TRN"]) }
 
-      Hashie::Mash.new(trn: row["TRN"], date_of_birth: Date.parse(row["Date of birth"]))
+      Hashie::Mash.new(trn: sanitise_trn(row["TRN"]), date_of_birth: Date.parse(row["Date of birth"]))
     }.compact
   end
 
@@ -74,7 +74,7 @@ def find_all(queries)
 
   def response
     @response ||= begin
-      queries = csv.map { |row| { trn: row["TRN"], dateOfBirth: Date.parse(row["Date of birth"]) } }.compact
+      queries = csv.map { |row| { trn: sanitise_trn(row["TRN"]), dateOfBirth: Date.parse(row["Date of birth"]) } }.compact
       find_all(queries)
     end
   end
@@ -90,4 +90,9 @@ def search_client
       token: ENV["QUALIFICATIONS_API_FIXED_TOKEN"]
     )
   end
+
+  def sanitise_trn(trn)
+    # Ensure the TRN is exactly 7 characters by padding with leading zeros, csv formatting can remove leading zeros
+    trn.to_s.rjust(7, '0')
+  end
 end
\ No newline at end of file