Support in cross-border transactions by Adults: Contract law vs capacity law
Thalia Kruger, University of Antwerp & Senior Research Associate, University of Johannesburg
This piece is based on a paper that I presented at the World Congress on Adults Protection, held in Amsterdam from 8 to 10 July 2026. It is still work in progress.
The World Conference focused on capacity rather than vulnerability and incapacity of Adults. This choice of theme resulted in much discussion on support for the exercise of capacity. Supported decision-making rather than replaced decision-making for an incapacitated person poses challenges for Private International Law, especially of the Von Savigny tradition. Our approach is to first characterise and then find which laws we can apply. But it is exactly this characterisation that is becoming blurry: to be fully in compliance with the UN Convention on the Rights of Persons with Disabilities people should be allowed to make decisions, i.e. conclude contracts with the help of others. There should be no boxes of capacitated and incapacitated persons. No longer can only the former conclude contracts, while the latter have to be represented by guardians or other persons with a representation function. In Adult law some concepts are phasing out, while others are being reinterpreted by legislators and courts.
Below, after briefly explaining the move towards supported decision-making in substantive family law and human rights law, I turn to the available legal framework for cross-border cases, then to the difficult question of characterisation, and lastly to cross-border recognition.