diff --git a/lib/census_api.rb b/lib/census_api.rb
index 44bd69ac3..d010c66db 100644
--- a/lib/census_api.rb
+++ b/lib/census_api.rb
@@ -119,8 +119,4 @@ class CensusApi
       {get_habita_datos_response: {get_habita_datos_return: {datos_habitante: {}, datos_vivienda: {}}}}
     end
 
-    def dni?(document_type)
-      document_type.to_s == "1"
-    end
-
 end
diff --git a/lib/document_parser.rb b/lib/document_parser.rb
index 8e043dd20..73130d34c 100644
--- a/lib/document_parser.rb
+++ b/lib/document_parser.rb
@@ -57,4 +57,9 @@ module DocumentParser
     end
     variants
   end
+
+  def dni?(document_type)
+    document_type.to_s == "1"
+  end
+
 end
diff --git a/lib/local_census.rb b/lib/local_census.rb
index 1a0428787..fc309730a 100644
--- a/lib/local_census.rb
+++ b/lib/local_census.rb
@@ -63,8 +63,4 @@ class LocalCensus
       LocalCensusRecord.find_by(document_type: document_type, document_number: document_number)
     end
 
-    def dni?(document_type)
-      document_type.to_s == "1"
-    end
-
 end
diff --git a/spec/lib/census_api_spec.rb b/spec/lib/census_api_spec.rb
index 32df56587..ce1e57a92 100644
--- a/spec/lib/census_api_spec.rb
+++ b/spec/lib/census_api_spec.rb
@@ -3,30 +3,6 @@ require "rails_helper"
 describe CensusApi do
   let(:api) { described_class.new }
 
-  describe "#get_document_number_variants" do
-    it "trims and cleans up entry" do
-      expect(api.get_document_number_variants(2, "  1 2@ 34")).to eq(["1234"])
-    end
-
-    it "returns only one try for passports & residence cards" do
-      expect(api.get_document_number_variants(2, "1234")).to eq(["1234"])
-      expect(api.get_document_number_variants(3, "1234")).to eq(["1234"])
-    end
-
-    it "takes only the last 8 digits for dnis and resicence cards" do
-      expect(api.get_document_number_variants(1, "543212345678")).to eq(["12345678"])
-    end
-
-    it "tries all the dni variants padding with zeroes" do
-      expect(api.get_document_number_variants(1, "0123456")).to eq(["123456", "0123456", "00123456"])
-      expect(api.get_document_number_variants(1, "00123456")).to eq(["123456", "0123456", "00123456"])
-    end
-
-    it "adds upper and lowercase letter when the letter is present" do
-      expect(api.get_document_number_variants(1, "1234567A")).to eq(%w(1234567 01234567 1234567a 1234567A 01234567a 01234567A))
-    end
-  end
-
   describe "#call" do
     let(:invalid_body) { {get_habita_datos_response: {get_habita_datos_return: {datos_habitante: {}}}} }
     let(:valid_body) do
diff --git a/spec/lib/document_parser_spec.rb b/spec/lib/document_parser_spec.rb
new file mode 100644
index 000000000..631983abc
--- /dev/null
+++ b/spec/lib/document_parser_spec.rb
@@ -0,0 +1,30 @@
+require "rails_helper"
+include DocumentParser
+
+describe DocumentParser do
+
+  describe "#get_document_number_variants" do
+    it "trims and cleans up entry" do
+      expect(DocumentParser.get_document_number_variants(2, "  1 2@ 34")).to eq(["1234"])
+    end
+
+    it "returns only one try for passports & residence cards" do
+      expect(DocumentParser.get_document_number_variants(2, "1234")).to eq(["1234"])
+      expect(DocumentParser.get_document_number_variants(3, "1234")).to eq(["1234"])
+    end
+
+    it "takes only the last 8 digits for dnis and resicence cards" do
+      expect(DocumentParser.get_document_number_variants(1, "543212345678")).to eq(["12345678"])
+    end
+
+    it "tries all the dni variants padding with zeroes" do
+      expect(DocumentParser.get_document_number_variants(1, "0123456")).to eq(["123456", "0123456", "00123456"])
+      expect(DocumentParser.get_document_number_variants(1, "00123456")).to eq(["123456", "0123456", "00123456"])
+    end
+
+    it "adds upper and lowercase letter when the letter is present" do
+      expect(DocumentParser.get_document_number_variants(1, "1234567A")).to eq(%w(1234567 01234567 1234567a 1234567A 01234567a 01234567A))
+    end
+  end
+
+end
diff --git a/spec/lib/local_census_spec.rb b/spec/lib/local_census_spec.rb
index abe7a2b32..bb598975f 100644
--- a/spec/lib/local_census_spec.rb
+++ b/spec/lib/local_census_spec.rb
@@ -3,30 +3,6 @@ require "rails_helper"
 describe LocalCensus do
   let(:api) { described_class.new }
 
-  describe "#get_document_number_variants" do
-    it "trims and cleans up entry" do
-      expect(api.get_document_number_variants(2, "  1 2@ 34")).to eq(["1234"])
-    end
-
-    it "returns only one try for passports & residence cards" do
-      expect(api.get_document_number_variants(2, "1234")).to eq(["1234"])
-      expect(api.get_document_number_variants(3, "1234")).to eq(["1234"])
-    end
-
-    it "takes only the last 8 digits for dnis and resicence cards" do
-      expect(api.get_document_number_variants(1, "543212345678")).to eq(["12345678"])
-    end
-
-    it "tries all the dni variants padding with zeroes" do
-      expect(api.get_document_number_variants(1, "0123456")).to eq(["123456", "0123456", "00123456"])
-      expect(api.get_document_number_variants(1, "00123456")).to eq(["123456", "0123456", "00123456"])
-    end
-
-    it "adds upper and lowercase letter when the letter is present" do
-      expect(api.get_document_number_variants(1, "1234567A")).to eq(["1234567", "01234567", "1234567a", "1234567A", "01234567a", "01234567A"])
-    end
-  end
-
   describe "#call" do
     let(:invalid_body) { nil }
     let(:valid_body) { create(:local_census_record) }