Chris Brown -- Alleged Ex-GF Shut Down in Court ... No Restraining Order

The woman claiming to be Chris Brown's ex-girlfriend didn't get the restraining order she requested after failing to produce any evidence she'd ever dated the singer.

Danielle Patti got her day in court to back up her bizarre claims -- that she and CB hooked up last December and when they broke up, he started harassing and threatening her via text and social media.

She'd already been granted a temporary restraining order, but on Tuesday in a L.A. court a judge asked Patti to hand over proof of any threatening messages from Brown. She told the judge she'd erased them because they scare her and she "didn't want the memories."

She also admitted she didn't have Chris' phone number or email address after being grilled by Chris' lawyers, Ben Meiseles and Setara Qassim.

The judge quickly tossed the case.