Peter Lawrence has led the campaign to find his daughter
A "potentially significant lead" which was received after a television appeal in the case of missing chef Claudia Lawrence has been discounted by police.
Following the BBC's Crimewatch programme on 25 February police were given information about an outdoor location in North Yorkshire.
Officers said the call from a member of the public had been made in good faith.
Miss Lawrence, from York, has been missing for almost a year. The case is being treated as suspected murder.
North Yorkshire Police said the information had "been fully investigated and has now been discounted".
During the Crimewatch appeal new CCTV footage was shown of Miss Lawrence at the University of York where she worked. She was last seen near her home in Heworth on 18 March, 2009.
It was her 36th birthday on Saturday 27 February.
Det Supt Ray Galloway said: "We want to reassure people that they should not hesitate to inform us of any suspicious activity.
"This call was made in good faith and related to a potentially significant location, despite it now being discounted, members of the public should not be put off from making a call if they have any information they believe could help."