Hardy and league officials met to discuss his domestic violence case and when the 2013 Pro Bowl selection might be reinstated from the commissioner's exempt list, where he has been since mid-September while waiting for his case to be resolved.
The charges were dropped on February 9 because ex-girlfriend Nicole Holder refused to cooperate with the Mecklenburg County, North Carolina, district attorney's office after reaching a financial settlement with Hardy.
Hardy, set to become an unrestricted free agent on March 10, is seeking immediate reinstatement.
The NFL is trying to determine if Hardy should be suspended for violating its personal conduct policy.
The league opened its own investigation after the charges were dropped. It has uncovered enough evidence so far to warrant suspension, a league source told ESPN.com.
One point of Wednesday's meeting was to get Hardy to turn over evidence from his July 15 bench trial in which a Mecklenburg County Judge found him guilty of assaulting and threatening to kill Holder. That verdict was set aside when Hardy requested the jury trial that never occurred because the charges were dropped.
According to a report on NFL.com, Hardy turned over documents from his case.
The NFL has been seeking photos, the trial transcript and other physical evidence from the May 13 crime scene to help with its investigation.
That investigation suffered a setback when the league's court motion to unseal evidence from the bench trial had to be withdrawn because the evidence already had been returned to the district attorney's office and Hardy's attorney, Chris Fialko.
The district attorney's office does not return evidence from a case, leaving it to Hardy and his attorney to decide whether to turn over evidence that potentially could incriminate Hardy.
Hardy was accompanied Wednesday by an attorney representing the NFL Players Association, according to a league source. The NFLPA is arguing that Hardy, if found to have violated the personal conduct policy, should be punished under the old policy under which a two-game suspension was given to first-time offenders.
That body is arguing that since Hardy initially was charged in May, he shouldn't be held to the new policy, adopted in late August. That policy calls for a minimum six-game suspension for a first-time offense of domestic violence.
Hardy received $13.1 million from the Panthers last season despite playing in only one game. The team is not expected to re-sign him.
Hardy has spent much of the past week retweeting messages on social media from people who say Carolina should keep him.
He offered this on Wednesday:
— Greg Hardy (@OverlordKraken) March 4, 2015