Probably, considering that when Jiraiya signed his contract, the previous people who did so too still had their names in that scroll, meaning that the contract pursues even through death. I know it's not a solid theory, but it's a start.
hanzo summoned ibuse.
the 2nd mizukage summoned his clam.
madara still has his contract with the kyuubi and the only thing keeping him from summoning it is the fact that its sealed in naruto.