README.md in active_merchant-epsilon-0.7.1 vs README.md in active_merchant-epsilon-0.8.0

@@ -215,11 +215,11 @@
     raise StandardError, response.message
   end
 end
 ```
 
-### Recurring Billing (Monthly subscritpion)
+### Recurring Billing (Monthly subscriptions)
 
 ```ruby
 purchase_detail[:mission_code] = ActiveMerchant::Billing::EpsilonGateway::MissionCode::RECURRING_6
 
 gateway.recurring(amount, creadit_card, purchase_detail)
@@ -239,9 +239,38 @@
 
 ### Verify Credit Card
 
 ```ruby
 gateway.verify(credit_card, user_id: 'user_id', user_email: '[e-mail]')
+```
+
+### GMO ID Settlement
+
+```ruby
+ActiveMerchant::Billing::EpsilonGmoIdGateway.contract_code = 'YOUR_CONTRACT_CODE'
+
+gateway = ActiveMerchant::Billing::EpsilonGmoIdGateway.new
+
+amount = 10000
+
+purchase_detail = {
+  user_id:      'YOUR_APP_USER_IDENTIFIER',
+  user_email:   '[e-mail]',
+  user_name:    'YAMADA TARO',
+  item_code:    'ITEM001',
+  item_name:    'Golden Product',
+  order_number: 'UNIQUE ORDER NUMBER',
+  gmo_id:       'Your member id of GMO ID',
+  gmo_card_id:  'Your sequential card number of GMO ID',
+}
+
+gateway.purchase(amount, purchase_detail)
+```
+
+### GMO ID Settlement Void Transaction
+
+```ruby
+gateway.void('order_number')
 ```
 
 ### Error handling
 
 If epsilon server returns status excepted 200, `#purchase` method raise `ActiveMerchant::ResponseError`.