This one is such an interesting claim that I am reporting it.
The person seems to be just a regular twitter user and has been on Twitter since 2008. He seems to be based in Flint, Michigan and reports the following:
7 people in a household and 6 received multiple unsolicited mail-in ballots no less than 4 each.
That is a minimum of 24 ballots for 6 people and if 4 is the minimum then this could be 30+ ballots for that household.
He reports that they threw them away.
How many others in Michigan had similar experiences with mail-in ballots and threw them away?
And how many received multiple ballots and voted with those ballots?
Here is his tweet about being based in Flint Michigan.