Instead customers wanting to use online, or telephone banking would travel to PostShops with Kiwibank services either at Tutanekai St, Amohau St, Ngongotaha Rd or Malfroy Rd.
Ms Richards-Ward said the closure would affect elderly residents, and people who relied on public transport, most commonly young families who could not afford their own car.
"The requests have come to us from a high number of elderly people, and those without transport, who use the post office to pay their bills," she said.
"We are asking NZ Post to continue to provide over-the- counter financial services at the Te Ngae Post Office.
"There has been a substantial number of people wanting to sign the petition to have the decision reversed."
The Te Ngae outlet served a wide area of Eastside residents as well as rural customers living near the lakes, she said.
"It is a huge effect on the community."
Ms Richards-Ward said the petition forms would be collected and signatures counted before being sent to New Zealand Post head office in Wellington next Monday.
"We ask if anyone has petition forms with signatures completed, could they hand them to us as soon as possible by Monday morning.
"We want all the signatures to go to Wellington."
A Kiwibank ATM would remain in the shopping centre for cash withdrawals and balances.
New Zealand Post defended its decision as part of changes it had made in other regions, to the way customers were using the banking and postal services, and remain viable.
Local businesses in more than 750 areas nationwide were already operating postal services for New Zealand Post, the organisation said.
