The NYPD has used tens of thousands of questionable subpoenas over the last decade to intimidate private companies into handing over the personal information of cops and civilians alike — all with no oversight from the city or the courts, The Post has found.

While the vast majority of subpoenas in New York State — and across the country — require the signature of a judge or the blessing of a grand jury, the New York City Council empowered the department nearly a century ago to issue such commands to force unwilling cops to produce internal records or appear at disciplinary hearings