diff --git a/README.md b/README.md
index b1b7409..c338dce 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ for all newly created Twingle projects.
 | CiviSEPA creditor                     | When enabled to integrate with CiviSEPA, specify the CiviSEPA creditor to use.                                                                                                           |
 | Gender options                        | Specify which CiviCRM gender option the incoming Twingle gender value should be mapped to. The list is based on your CiviCRM configuration.                                              |
 | Record *Payment method* as            | Specifiy the payment methods mapping for incoming donations for each Twingle payment method.                                                                                             |
-| Double opt-In                         | Let CiviCRM handle the double opt-in. Group memberships for newsletter mailing lists will be pending until receivement of double opt-in confirmataion.                                   |
+| Double Opt-In                         | Let CiviCRM handle the double opt-in. Group memberships for newsletter mailing lists stay pending until the subscription gets confirmed. Note that this only works for public mailing lists. Any non-public mailing lists will be ignored. Do not forget to disable Twingle's double opt-in option in the Twingle Manager.  |
 | Sign up for groups                    | Whenever the donor checked the newsletter/postal mailing/donation receipt checkbox on the Twingle form, the contact will be added to the groups listed here.                             |
 | Assign donation to campaign           | The donation will be assigned to the selected campaign. If a campaign ID is being submitted using the `campaign_id` parameter, this setting will be overridden with the submitted value. |
 | Create membership of type             | A membership of the selected type will be created for the Individual contact for incoming one-time donations. If no membership type is selected, no membership will be created.          |