Board Thread:General Discussion/@comment-43672997-20190930030522/@comment-39170536-20190930135325

A weak Internet connection can make your next transaction arrive before your last one was completed. That is why it is crucial to wait for the “receipt” so to speak, of your last transaction.

Belle is right — if you do get caught they calculate your penalty on the length of time you went back. So traveling back one day limits your exposure.