After losing more than $667,000 while gambling in recent years, a manager at the U.S. Post Office in north Kenner stole $630,000 worth of stamps from his job and sold them online, federal authorities in New Orleans said this week.

Ryan S. Cortez, 46, also embezzled nearly $10,000 from a church in Des Allemands that listed him as its treasurer, all to fuel a gambling problem to which he confessed, the feds allege.

Cortez faces accusations of misappropriating postal funds or property following his arrest on a criminal complaint Wednesday.

According to the complaint, an agent with the U.S. Postal Service inspector general's office noticed there were $630,000 worth of stamps listed in reserve at the post office at 390 W. Esplanade Ave. when the usual amount is no more than $70,000.

Suspicion focused on Cortez, the manager of customer service operations at the facility, because he was frequently in charge of the office’s stock of stamps.

The agent, William Kuhn, then noticed Cortez had used the online marketplace eBay and the payment service PayPal to sell “large quantities of stamps at significantly less than their face value to several individuals,” the complaint said.

PayPal had allegedly flagged Cortez’s account for “suspected fraudulent activity” in May, when he was routinely receiving checks of about $2,000 to $4,900 for stamps.

In one month alone this summer, he deposited $58,000 worth of checks into a Regions Bank account, the complaint said. The complaint said Cortez sold 10,000 stamps with a face value of 50 cents for 38 cents apiece.

Authorities then obtained records that showed Cortez was a regular at casinos, including Harrah’s in the Central Business District.

The records suggested Cortez withdrew cash at Harrah’s in a way meant to avoid triggering reporting requirements, a “technique … used sometimes by those engaging in illicit money laundering operations,” the complaint noted.

The records also showed he lost more than $220,000 gambling last year and a total of $667,522 since 2011 — much more than he earned on his annual salary of less than $71,000, according to the complaint.

Additionally, investigators learned that Cortez had deposited into a personal account more than $9,000 that belonged to Des Allemands Mennonite Church, where he is the treasurer.

Federal agents confronted Cortez on Wednesday. They said he admitted he stole “hundreds of thousands” of dollars worth of stamps to sell on eBay and defrauded his church because he was addicted to gambling. A pair of buyers, one in Montana and the other in New Jersey, bought most of the stamps, he said.

Cortez faces up to 10 years in prison and a fine of $250,000 if convicted of the allegations in the complaint. He was initially ordered held without bail but appeared in court Thursday.

On Wednesday, unlike the other defendants who appeared before federal Magistrate Daniel Knowles III in prison jumpsuits, Cortez was dressed casually in a button-front shirt and bluejeans. The only signs he faced a serious crime were the chains that shackled his arms and legs. 

“You have a bit of credit card debt,” Knowles noted as he reviewed documents prosecutors had compiled on Cortez. 

Knowles eventually assigned him a public defender.

A short time later, marshals walked Cortez out of the courtroom, the shackles still around his wrists and ankles.

WWL-TV reporter Danny Monteverde contributed to this report. 

Follow Ramon Antonio Vargas on Twitter, @RVargasAdvocate.