Postmaster General Louis DeJoy pledged Thursday that the US Postal Service will undertake “heroic efforts” to deliver all mail-in ballots on time this year and urged people to put their ballots in the mail at least one week before Election Day on November 5.

After filling out your ballot, insert it in the provided envelope and mail it to your county elections office. Mail ballots must be postmarked on or before Election Day — Tuesday, Nov. 5 — and received by the elections office no later than seven days after Election Day, according to the California Secretary of State’s office.

That letter, which was written to represent elections officials in all 50 states, claims there has been inconsistent training within USPS, exceptionally long delivery times, and a jump in mail returned as undeliverable. Then, earlier this week, DeJoy responded.