If you are voting absentee by mail, note that your ballot might need extra postage.
Many absentee ballots for the Nov. 4 presidential election are so long and weigh so much that mailing them back to elections supervisors requires extra postage, in many cases.
The U.S. Postal Service generally returns mail with insufficient postage to the sender, but that can take days.
Mailing costs vary, depending on everything from the size of the envelope to the weight of the paper. Check with your local postal authorities for proper postage.