U2 is limiting ticket sales for its April 8 Vertigo Tour at Aloha Stadium to four tickets per household.

"Persons who exceed the ticket limit may have any or all of their orders and tickets canceled without notice by Ticketmaster in its discretion. This includes orders associated with the same name, e-mail address, billing address, credit-card number or other information," the band's ticket-limit policy said.

U2's policy varies by locale.

For example, the limit for U2's Feb. 20 concert in Sao Paulo, Brazil, is 10 per household, but 73,000 tickets were available.

While there's no way to track addresses of cash transactions, Ticketmaster can pinpoint addresses tied to credit card purchases. So, if two people with the same address purchased eight U2 tickets, four of them would automatically be returned to the general ticket pool and the money would be credited back to the purchaser's account.

Aloha Stadium Authority spokesman Patrick Leonard said the concert, which is expected to draw 35,000 people, is "technically sold out."

The company's policy on tickets per customer or "ticket limits" states: "When purchasing tickets on Ticketmaster.com, you are limited to a specified number of tickets for each event (also known as a 'ticket limit'). This amount is included on the unique event page and is verified with every transaction. This policy is in effect to discourage unfair ticket buying practices."

Other than an inquiry from The Next Adventure (Clear Channel Entertainment), RZO Production, Live Nation and Shep Gordon, who are presenting and producing U2's concert in Hawai'i, about the availability of Aloha Stadium on Feb. 9, there is nothing to report on a possible second concert, Leonard said.

"Officially, Aloha Stadium cannot confirm anything until there is a signed contract," Leonard said.

Reach Rod Ohira at rohira@honoluluadvertiser.com.