Tosefta על חולין 1:7

[What is] valid in a get (a bill of divorce) is invalid in a prosbol (a document permitting debt collection after the sabbatical year), [and what is] valid in a prosbol is invalid in a get (see Ket. 9:9). [What is] valid in [other] women is invalid in a yevama (a childless widow who is only permitted to her deceased husband's brother) and [what is] valid in a yevama is invalid in [other] women. [What is] valid in a divorced woman is invalid in a chalutzah (a yevama whose brother-in-law does not marry her), and what is valid in a chalutzah is invalid in a divorced woman. (See Hul. 1:7.)