Board Thread:Versus Debates/@comment-3523655-20200802172018/@comment-32685487-20200802194211

That's speculation. The contract seals only worked on summoned beasts where there is actually a real summoning contract done. Minato can't do that to Edo Tensei otherwise Itachi or somebody else would have done so in the 4th War. Minato also has never shown and isn't said to be able to use the Shiki Fujin Shadow Clone variation like Hiruzen can.