U.S.A.
Talkin' about U.S., some unconfirmed sources gives a Gold to Tonight's The Night and Trans,
Platinum to Neil Young (his first solo album), Comes A Time and Ragged Glory,
3x Platinum to Everybody Knows This Is Nowhere,
then all decertified (???) or anyway disappeared on RIAA database.
(It seems that also Emmylou Harris spoke about some decertified albums of her around 1990/1991.
The same about albums by Jimi Hendrix, Bob Dylan, Roy Orbison, Clash, Rolling Stones, Queen and others!).

Record World magazine of 28 april 1973 and Cashbox magazine of 5 may 1973, wrotes about Platinum awards presented by Warner Bros. Records (and not by RIAA, of course, because RIAA starts with Platinum certifications in 1976) for each Neil Young album that reached 1.000.000 copies sold: supposedly those three albums are Everybody Knows This Is Nowhere, After The Gold Rush and Harvest.
Other artists certified with Platinum in the same period: James Taylor (two awards), Alice Cooper (three awards), Jethro Tull (three awards), Black Sabbath (two awards), America (two awards), Peter, Paul and Mary (five awards), Bill Cosby (five awards), and Dean Martin (three awards), as well as Arlo Guthrie, the Allman Brothers Band, Rod McKuen and Anita Kerr (for the San Sebastian Strings), Frank Sinatra, and Seals and Crofts.

CANADA
The Platinum award for After The Gold Rush is claimed on Billboard, 2 october 1976 (but not on CRIA, now Music Canada, database).

U.K.
Unconfirmed sources gives a Gold to Time Fades Away in U.K., anyway not on BPI database.

NEW ZEALAND
Most of New Zealand certifications are without date of accreditation.

GERMANY
Platinum certification for single Heart Of Gold in Germany is not on BVMI database (was claimed on issue 46, 14 november 1992, of Music & Media magazine).

A Lifetime Award for sale more than 2.500.000 albums to date, was given in august 1995 from Warner Music Germany.

CANADA
According to CRIA web-site (now Music Canada), Harvest is not certified and Harvest Moon is 5x Platinum; but a WEA Canada reply at my request said different: Harvest 5x Platinum and Harvest Moon "only" 2x Platinum.

U.K.
During the summer of 2017 BPI change the look of his site and the Silver of 2009 for On The Beach disappeared from the database.

AUSTRALIA
The 7x Platinum for Harvest in Australia is not on ARIA database, but is on issue 662 of ARIA Report, available on Pandora website.