Show us your papers, Bill

Mayor de Blasio’s No. 2, Tony Shorris, swears his underlings were deceived into handing the keys to a former city public school building turned AIDS home on the Lower East Side, known as Rivington House, to a nursing home operator secretly planning luxury condominiums for the site.

As First Deputy Mayor Shorris told the City Council in September, speaking of dealings with the Allure Group: “We believe, and not as a lawyer, but that there was deceptive practices by Allure; that’s part of the reason I think the the city, but I also believe the state, may not have been informed correctly of their intentions.”

De Blasio, too, has trotted out the we-werewronged excuse, complaining as the scandal unfolded: “We have a lot of evidence that they misled us.”

Oh really? We’re still waiting for the legal case that proves it — and so is so is state Sen. Daniel Squadron, who last week sent a letter to state Attorney General Eric Schneiderman and city Corporation Counsel Zachary Carter urging action under state and city statutes that allow civil lawsuits against schemers who rip off the government.

For victims wronged, Shorris and de Blasio appear awfully reticent to step forward and make their case — saying only, through a Carter spokesman: “We have awaited the conclusion of ongoing investigations to determine whether there is evidence to support a claim of fraud in connection with the Rivington transaction.”

And who can blame them. Heaven or hell knows what potentially devastating information about the city’s own actions would surface in the objective glare of court proceedings, about matters so sensitive that Carter’s Law Department took the extraordinary measure of denying the city Department of Investigation access to City Hall’s computer networks to reconstruct why city officials so badly botched Rivington House.

Count on Carter to do squat. But Schneiderman has his work cut out for him.