Releasor (noun)
A person who releases (surrenders) a claim on an estate
Releasee (noun)
A party that is given a release
Wiktionary
Releasor (noun)
a person who releases property or money to another person or entity
“releasees want to be sure that the releasor consents”
Releasee (noun)
an offender who has recently been released from prison
“the issuance of a warrant is justified if the releasee has been arrested for an offence”
Releasee (noun)
a person or entity to whom property or money is released
“there was no land to which this covenant could be annexed so as to pass to the releasee”
Oxford Dictionary