Simply click on the “Missing Tweet” link at the bottom of the screen. Then select “Link is broken.” This will return this information back into Twitter’s ecosystem, where new tweets and retweets won’t show up in your list of activity. The URL for that tweet will continue to exist and remain in a searchable index hosted by Bing/Yahoo. (note: It may take a few minutes for that particular retweet to stop showing up in your friends’ timelines.)
If there are any tweet IDs in this list that contain RT or MT, those were retweets or a quote from another user. Retweets will NOT show up in an API response unless the original tweet (or user) has their privacy set to “Everyone,” so these “missing” tweets would not have shown up if you requested them directly through Twitter’s API.
Please note: This may be related to an issue with home timelines for certain users who only follow one account. They are seeing this message because they receive all the retweets from that account, even if the original tweet was posted to a protected timeline (in which case it could be deleted).
Best practice is to filter those tweets out of your main timeline by setting up a new user account and following only your personal account on that new account. Then set your home timeline view to follow just that second user account – otherwise you’ll see all my retweets in yours!
If anyone comes across other tips or tricks for removing RTs from their home timelines with multiple accounts, please share them here! I didn’t want to create yet another private group on google plus when there’s lots of discussion going on already (and Google Plus is not accessible through work web browsers).
There are two ways to effectively undo a retweet. The user can either delete the original tweet before sending, or they can retract the retweets from their profile page in order to get rid of it entirely.
Log into your Twitter account, then click “Tweets” to view all the tweets you have ever sent and retweets. Retweeted tweets are distinguished by a green arrow at the top right of their box. Click on any retweet to delete it.
To delete these original retweets, you must re-retweet the tweet and make it green before deleting the tweet. You can remove your old retweet from here by clicking on this icon or tab. This will also delete the previous tweet that is over 6 months old. Tap or click on Retweet when viewing your profile to get started.
To answer your question, retweeting will not result in a notification if done from another account.
Retweets that are inaccessible can’t be deleted, so they remain on the counter forever.