Although Facebook notifies your friends when you join a group, even if you are an active member, the site does not tell you when someone leaves a group. However, there is a way to find out who left a group and why.
First, you will need to know the username of the person that left the group.
Next, use the Facebook Search feature to search for posts made in the group by that user. This will help you find any conversations that may have taken place about leaving the group.
Finally, send each lefting friend a private message explaining why they were removed from the group and encouraging them to join another.
This will help keep negative people out of your group and allow you to manage your membership more effectively.
If you would like to restore these users into the group, then you will need to do so manually.
The best way to do this is with the aid of some automated software. There are several tools available online that will scan a group and identify users that have been absent for too long. After scanning the group, these tools will automatically contact each missing user and ask them to re-join the group.
No When a person exits a Facebook group, no one is contacted. Not even the administrator. They will only know if someone checks to see whether you are still present.
When you join a group, whether private or public, your Facebook friends may notice. Some groups are hidden and cannot be found, thus you must be invited by a member of a qualified group. When you leave a group, the other members are not notified. This is different from deleting an account; when you delete an account all associated information is removed.
The Facebook Support Team When you quit a group, your posts will remain there. This means other people can still post on your wall, but no one new will be able to see your activity until you choose to make your page public again.
When you deactivate your Facebook account, Facebook does not give you any kind of notice. Your friends will not know you've cancelled your account until they try to find your now-deactivated profile or ask you in person. Even then, there's no guarantee that they'll understand why you have deleted your account.
Deactivating and un-deactivating your account is its own special challenge for users. When you delete your account, you also delete all of your posts, comments, and other types of content that you have published on Facebook over the years. Therefore, if you want to avoid having your friends wonder what happened to you, you should do so before you lose touch with them!
In addition, if you cancel your account but then change your mind later, you can always reactivate it. There are several reasons why someone might want to cancel their account without leaving it permanently, including if they get into an argument with another user or if they decide they don't like the new type of audience that Facebook presents to them.
Cancelling your account only removes your personal information from Facebook's servers. It does not delete any messages you may have sent nor does it remove you from any groups you are a part of. In order to completely erase everything about you on Facebook, you will need to delete your account entirely.
When you ask someone to join a Facebook group, they may preview the group and decide whether or not to join. They may also view posts from the group during this period. Only members who have been invited to a secret group are able to preview the group. Other people see an error message when they try to visit the group page.
A group admin can regulate membership and content, allowing for a more concentrated conversation. However, if the group's only administrator departs, no one is in control. The group will stay on Facebook until all of its members depart, at which point it will be disbanded. There is no way to manually delete a group.
Anyone who searches for public Facebook groups may find them, and anyone can see who is in the group and what discussions are going on. Members must still request to join, and they must join before they may engage actively. However many groups include rules which forbid certain subject matters or types of conversation. These rules may be set by the owner/operator of the group, or by a moderator who may be chosen by the group's owner.