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Rules Reference, page 16 - Parley wrote:
Some abilities are identified with a Parley action designator. Such abilities are initiated using the “Activate” action (see “Activate Action” on page 4).
Rules Reference, page 4 - Activate Action wrote:
A scenario card that is in play and at the same location as the investigator. This includes the location itself, encounter cards placed at that location, and all encounter cards in the threat area of any investigator at that location.
So you have to be in the location with Parley in order to do it.