English term (edited): other ... at-will employment relationship

I assume that it is more so the phrase "at-will employment relationship" which is problematic. Otherwise, your posting is over the ProZ' guideline of 10 words.

at-will employment relationship > relación de empleo a voluntad

Signature of Applicant / Firma del Solicitante Date / Fecha
www.hayes-stolz.com/docs/H-S-Application.docx
Application For Employment Solicitud de Empleo .... It is further understood that this “at will” employment relationship may not be changed by any ... Se entiende más a fondo que esta relación de empleo "a voluntad" no se puede cambiar a ...

Employment Application Spanish & English - Any Concrete Cutting
www.anyconcretecutting.com/application-en-sp.pdf
Fair Employment Practices and Housing Act, Arkansas Labor Code and other ... by J.S. West et al is employed at the will of the employer. .... this “at will” employment relationship may not be changed by any written document or by ... más a fondo que esta ***relación de empleo "a voluntad" *** no se puede cambiar a través de ...

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Note added at 11 hrs (2016-06-24 14:50:16 GMT)
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https://en.wikipedia.org/wiki/At-will_employment
At-will employment is a term used in U.S. labor law for contractual relationships in which an employee can be dismissed by an employer for any reason (that is, without having to establish "just cause" for termination), and without warning.[1] When an employee is acknowledged as being hired "at will", courts deny the employee any claim for loss resulting from the dismissal. The rule is justified by its proponents on the basis that an employee may be similarly entitled to leave his or her job without reason or warning.[2] In contrast, the practice is seen as unjust by those who view the employment relationship as characterized by inequality of bargaining power.[3]

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Note added at 2 days21 hrs (2016-06-27 01:08:53 GMT) Post-grading
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Gracias Luisa.