Related על גיטין 103:9

[Legal guardians] shall not sell distant [property] in order to purchase [property] that is nearby, or [sell property] of poor quality to buy [property of] good quality. They may not [involve themselves in orphans'] legal matters, [whether] to hold them liable, to confer a benefit, to earn money, [or] to spend money, except if [the guardians] receive permission from the court (beit din). And the legal guardians must make an accounting with the orphans at the conclusion [of the guardianship], the words of Rebbi. Rabban Shimon ben Gamaliel says, The court does not designate women [manuscript adds "or minors"] or slaves as legal guardians at the inception [of the guardianship]; however, if [the orphans'] fathers designated these during his lifetime, [the court must] appoint them as legal guardians [after the father dies].