The documents were introduced through the trial's first witness, Jeffrey McConney, who as Trump Organization's controller is responsible for its payroll and tax reporting.
"President Trump," McConney said of the signature, identifying the now widely-recognized, mini mountain range of Sharpie ink at the bottom of the letter.
"In other words, Donald J. Trump authorized Donald J. Trump to sign the lease" for the apartment, Steinglass asked of the letter's content.
"Weisselberg did it for Weisselberg," as Trump Organization lawyer Michael van der Veen told jurors repeatedly in openings.
"Who decided that Donald Trump would pay Allen Weisselberg's tuition," the prosecutor then asked.