All of those ballots should reach voters by the end of the week, Pima County Clerk Gabriella Cázares-Kelly said Monday.

Affected include some Pima County voters who are on the early voting list and some who submitted one-time early voting requests before Oct. 8, who will experience a “slight delay” in delivery of ballots, county officials announced Sunday evening known.

The first ballot papers arrived in mailboxes across the county over the weekend.

The delay was related to a processing issue that was discovered and reported early in the ballot assembly process, the recorder's office said.

Cázares-Kelly said Monday that about 200,000 ballots sent to the post office last week should have already reached voters' homes in Pima County.

The approximately 89,000 items that arrive at the post office each day on Saturday, Sunday and Monday – a total of about 267,000 – are experiencing delays, she said.

Even if there are delays, ballots cast by Friday will still be received within the usual time frame, but if there are no ballots in voters' hands by the end of the week, that would be “outside the norm,” said she.

If a voter has not received their ballot by the end of the week, they should call the Recorder's Office at 520-724-4330, Cázares-Kelly said.

Or, if they don't feel like waiting any longer, there are currently three early voting sites and another scheduled to open next week in Oro Valley, she said. Ultimately, there will be a total of 19 locations in Pima County “where voters can go to return their ballots or cast early ballots.”

“And we will also be offering drive-thru ballot drop-offs (at four locations) so people can just drive up, drop off their ballot and have a poll worker secure it,” she said.

The addressing error was explained in a press release from the county as follows: Earlier this month, the Recorder's Office had to mail new voter registration cards to 505 voters in the Continental School District “and to four voters in another school district after the county” after discovering that they were due to a mapping error were assigned to the wrong school district.”

The county paused the entire mailing process for about a day to ensure ballots were mailed correctly, said Mark Evans, a county spokesman.

The county elections department worked with Phoenix-based Runbeck, which prints Pima County's ballots, to ensure all voters can vote in the elections for which they are eligible, the Recorder's Office said.

“To ensure 100 percent accuracy, Pima County stopped printing, resulting in an unforeseen delay in ballot assembly,” the release said. “We thank Runbeck for his commitment to getting our ballots to voters as quickly as possible, and we thank the USPS for their quick work in processing absentee ballots once they are received.”

The last batch of ballots, about 89,000, were on their way from Phoenix to Tucson on Monday and are expected to arrive at the post office in the afternoon, Cázares-Kelly said. Because Monday was a federal holiday, most late ballots will arrive in Pima County mailboxes after Tuesday and in more rural areas throughout the week, she said.

To learn more about vote centers, voting locations and hours of operation, visit www.pima.vote.

The deadline to request an absentee ballot or early vote is October 25th.