The Tuohy family says it's doled out $138K to Michael Oher from profits it received from "The Blind Side" ... and it's now claiming it's got the receipts to prove it.
Sean and Leigh Ann Tuohy shared images of the alleged payments inside new court documents filed in Tennessee this week ... insisting they show Oher received money from them in 10 separate installments.
The Tuohys said in the docs the payments began in June 2007 -- roughly two years before the blockbuster movie about Oher's life was released in the U.