Let’s say you have a affidavit from your Ecuadorian supplier saying that the goods do not contain lead. It’s then rubber stamped by the Ecuadorian government office that does this. The Senegalese customs official says “this needs to be notarized and attested by the CEO of the supplier.” So now you have an official document that took months of work and lots of bribes to Get. You just take this document as is to get attested and notarized. So the CEO types his attestation on the typewriter and signs it and the notary applies their seal.

Large countries like the US, EU, China have solved this with automated processes but the smaller countries havent.