You can refer to someone who finds something as the finder of that thing.
The finder of a wallet who takes it home may be guilty of theft.
Every stray dog has to be taken by its finder to the police.
finder in British English
(ˈfaɪndə)
noun
1.
a person or thing that finds
2. physics
a small low-power wide-angle telescope fitted to a more powerful larger telescope, used to locate celestial objects to be studied by the larger instrument
3. photography short for viewfinder
4. finders keepers
finder in American English
(ˈfaɪndər)
noun
1.
a person or thing that finds
2.
viewfinder
3.
a small, low-powered telescope attached to a larger one, used to locate objects for closer view with the more powerful telescope
4. US
a person who, for a fee (finder's fee), initiates a business deal between others
Examples of 'finder' in a sentence
finder
A whistleblower claimed one agency demanded a 10,000 finder's fee.
The Sun (2016)
They are so popular that it may be beneficial to use a specialist property finder.
Times, Sunday Times (2007)
This is deemed to be if the keys had identification attached to them that would lead a finder to your property.
Times, Sunday Times (2012)
Police searched a field under an airport flight path yesterday after reports of two men holding a device resembling a range finder.
Times, Sunday Times (2014)
They'll get a finder's fee if a deal is done.
Times, Sunday Times (2009)
In other languages
finder
British English: finder NOUN
You can refer to someone who finds something as the finder of that thing.
The finder of a wallet who takes it home may be guilty of theft.
American English: finder
Brazilian Portuguese: quem acha
Chinese: 拾获者
European Spanish: descubridor
French: personne qui trouve
German: Finder
Italian: chi trova
Japanese: 発見者
Korean: 발견자
European Portuguese: descobridor
Latin American Spanish: descubridor
All related terms of 'finder'
range finder
any of various instruments for determining the distance of a target or object from an observer , or from a gun , camera , etc.
finder's fee
a payment made to a person who facilitates a business or financial deal by, for example, bringing a buyer and a seller or a lender and a borrower together
direction finder
a highly directional aerial system that can be used to determine the direction of incoming radio signals, used esp as a navigation aid
sonic depth finder
an instrument for detecting the depth of water or of a submerged object by means of sound waves ; Fathometer
automatic direction finder
a type of radio compass that indicates automatically the direction of the station to which it is tuned , used esp. on aircraft
fact-finding
A fact-finding mission or visit is one whose purpose is to get information about a particular situation, especially for an official group.