moved discussion on origin 

The following was inserted into the article by user:144.132.100.183
I do not dispute that Jack Dyer is credited with inventing the drop punt. Hugh Hinks invented the Drop Punt in 1907. Page 342 & 347 ì In The Beginning There Was Carisbrookî by Daryl McLeish, 2001.
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Despite claims to the contrary Carlton believed  that Horrie Clover invented the drop punt. Teammate Newton Chandler believed that Clover first saw the kick used by a teammate at Carisbrook and that he perfected it from there. 6th Edition The Encyclopedia of AFL Footballers.
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Len Metherell, who made his debut in 1930, see 6th Edition The Encyclopedia of AFL Footballers, certainly used the drop punt, and indicated that he had learned it from his father. With the retirement of Dyer in 1949 the drop punt gradually fell into disuse. When Bartle, of Geelong, took a spectacular mark five meters from goal in 1958 and kicked a behind, the Geelong advertiser admonishes: he foolishly tried a drop punt. 3AW Book of Footy Records 1989 page195/6 
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Interestingly Jack Dyer commenced with Richmond in 1931 and would have played against Clover and Metherell. 
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Next recorded  use was by the Collier Brothers see Page 195 3AW Book of Footy Records. 
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Next recorded use was by Jack Dyer. The Sporting Globe FOOTBALL Book 1948.
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Page 49: Jack Dyer gets goals with the sillies looking kick in football history.
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Jack Dyer adapted the Collier Brothers of Collingwood’s Drop Punt, which they used as a short pass of around ten yards in place of a hand pass. They only used it to pass the ball to each other over the head of an opponent. See page 165, Jack Dyer Captain Blood as told to Brian Hanson, Paul, (London), 1965. 
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Interesting note. 
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The drop punt had a slow take-up by teams: Dyer himself attributed this to 
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Coaches do no teach this kick to their players for one reason. They cannot do it and have never bothered to learn its fundamentals Football Clinic, p.167 Captain Blood, Jack Dyer. As told to Brian Hansen, Paul, (London), 1965.
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I cannot find any information that records that Jack Dyer actually was the first. 
I have reworded the article slightly to reflect this, but when you are talking about things that happened 70-100 years ago, we'll never get a definitive answer, so have to just go by the reliable sources, even if they contradict each other to a degree.