The forgiveness frog was a gift to be given to make amends with someone who had been wronged.
"When no apology will do, give the forgiveness frog. It's like a card, only much better, because it's a frog." -- The Voodoo Lady.
Acquisition[]
It could be bought at The International House of Mojo.
Usage[]
Threepwood would have to write a personalised message on the frog and give it to Carla because he had not returned a book he borrowed. After doing so, she would allow him to borrow another book.
In the Hard Mode, Guybrush would need to write a personal apology on the Frog in order for it to be effective, which he did with the use of a state of the art pen.