This is an example of a Certificate of Authenticity as issued for all the lithographs. The handmade numbering implies that the lithograph has been purchased, and the card provides much promotional information as well. The selected certificate is for the painting 22-72 Vacation Panel, that was later renamed Leaving Their Cares Behind. (See the full certificate HERE).

This is Barks' own file copy (he did not sign it properly for the same reason) for the serigraph to 144-96 I Wonder What My Fortune Cookie Says. The serigraph was printed in 1997 as a limited edition version in 295 official issues. On the backside is several pieces of  technical information. The rather strange appearance of the certicate is due to the fact that the upper part can be folded down thus revealing the card as a depiction of a treasure chest.

When Barks had ceramic tiles made, they were not always supplied with a title. This was also the case with this tile, but the certificate's text provides some information about the motif.
The certificate is from Barks' own files, onto which he has jotted down a few data: The date of his actual signing as well as the number signed. For some unknown reason it was quite common for him to sign many more certificates than were actually needed. In this case he signed 150 certificates where only 100 tiles were issued.

This is half of the certification for the porcelain figurine Eureka from 1998 based on Barks' oil painting 147-96 Eureka! A Goose Egg Nugget. The figurine was made by Italian master sculptor Giuseppe Armani who also signed the certificate that came mounted in a wooden frame.
The other half of the certification was a small folder depicting an image of the original painting as well as Barks' and Armani's signatures.

Barks' bronze figurines came with the expected certificates, but on a few occasions it was the other way around! The certificates were produced and signed but the bronzes were not put up for sale!
Above is one example: A figurine series titled Time Waster based on two of Barks' 1975 oil paintings was planned but abandoned just before production. A similar fate befell a special bronze bas relief titled The Wadfather, that was simply banned by the Disney company which refused to allow the production of more bronzes. It is believed that less than 10 were produced.
Notice that the above certificate erroneously is mentioned as Certificate of Verification!

In connection with the 1997 Disneyana Convention Barks had a special Scrooge McDuck wrist watch made to celebrate the character's 50th anniversary.
The front of the analog watch shows Scrooge playing in his Money Bin, while the back depicts the occasion in engraved text, and the black leather strap bears some golden dollar signs. The object rests in a small 22 carat gold brick box.
The box was made in a quantity of 500, but (as usual) Barks signed more, namely 600, over a three day period. This earned him a fee of 5,000 dollars.

Barks never made certificates for his individual oil paintings as they were not produced in quantity, but he usually made receipts for the purchases. Above is the original copy of Barks' very first official receipt from his many Disney duck order books.
It refers to 19-71 Money Lake, which by no means was his first Disney painting, as a handful previously had been sold with other types of receipts or given away. (The customer's private data has been deleted by this website.)