The family of the rugby legend said they are no longer going ahead with legal proceedings to try to declare a will left unsigned by Joost, as valid.
The will is said to be the last one drafted on behalf of Joost in 2015, in terms of which his estranged wife only inherited a TV.
This will was rejected by the Master of the High Court, as it was not signed by Joost.
He suffered from motor neurone disease and was too weak to sign himself.
His lawyer, Ferdi Hartzenberg, signed it as Commissioner of Oaths, but someone had to sign on behalf of Joost.
Hartzenberg did not want to comment on the issue, other than to confirm that they would no longer launch urgent proceedings in the Gauteng High Court, Pretoria, to have that will declared valid.
“I have received instructions from Joost’s family not to go ahead with the application,” Hartzenberg told the Pretoria News.
It is understood that most of Joost’s assets have in any event been moved to his J9 Trust of which his two children, Jordan, 13, and Kylie, 11, are beneficiaries.
Amor has meanwhile submitted a will signed by both of them in 2009, in terms of which she inherited everything in the estate.
Amor said she was contesting the unsigned will because it was in the “best interests” of her children.
She wanted them to maintain the lifestyle and hobbies to which they were accustomed.
Joost died in February this year following a long battle with motor neurone disease.