Final answer:
Gilderoy Lockhart falsely claimed to have received the Order of Merlin, Third Class in the Harry Potter series.
Step-by-step explanation:
The character Gilderoy Lockhart from the Harry Potter series, written by J.K. Rowling, claimed to have been awarded the Order of Merlin, Third Class. However, it is later revealed that many of his achievements, which presumably included earning such honors, were fraudulently claimed. In the Harry Potter world, the Order of Merlin is an award given for magical achievement and service to the wizarding world, with three classes signifying the level of the honor. There is no 'Honorary Member' option, and as such, by process of elimination, and remembering Lockhart's penchant for saucer-sized medals and grandiose titles, we can assume he claimed it was Third Class.