Ballots that arrived during states' grace period represented a small but sometimes important portion of mail-in ballots
Standfirst ...
Grace period ballots
All mail-in ballots
0%
25
50
75
100
Alaska
 2,796 grace period ballots
Massachussets
 3,403 (<1%)
Minnesota
 12,354 (<1%)
North Carolina
 approx. 15,000 (<1%)
Pennsylvania
 approx. 10,000 (<1%)
Washington
 100,209
West Virginia
 1,119 (<1%)