обязуется перед Доверительным Собственником Обеспечения Покупателя не совершать умышленных действий по причинению вреда

или

обязуется перед Доверительным Собственником Обеспечения Покупателя не не причинять вреда/ущерба умшленно/намеренно

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Note added at 14 mins (2008-01-17 12:22:22 GMT)
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здесь, мне кажется структура следующая:

Each Purchaser Secured Creditor undertakes to the Purchaser Security Trustee not knowingly to prejudice ... the Security Interests created under or pursuant to this Deed or the Purchaser Secured Property or the interest of the Purchaser Security Trustee therein +

Each Purchaser Secured Creditor undertakes to the Purchaser Security Trustee not ... or do anything inconsistent with the Security Interests created under or pursuant to this Deed or the Purchaser Secured Property or the interest of the Purchaser Security Trustee therein.


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Note added at 18 mins (2008-01-17 12:26:26 GMT)
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причинение вреда по отношению к --> Security Interests or the Purchaser Secured Property

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Note added at 24 mins (2008-01-17 12:32:25 GMT)
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http://dictionary.reference.com/browse/prejudice

American Heritage Dictionary:
prejudice
1. ...

Kernerman English Multilingual Dictionary (Beta Version)

prejudice verb
1. to harm or endanger (a person's position, prospects etc) in some way
Example: Your terrible handwriting will prejudice your chances of passing the exam.
2. To affect injuriously or detrimentally by a judgment or an act.

Merriam-Webster's Dictionary of Law - Cite This Source - Share This
Main Entry: prejudice
Function: transitive verb
Inflected Forms: -diced; -dic·ing
1 : to injure or damage the rights of by some legal action or prejudice <if it appears that a defendant or the government is prejudiced by a joinder of offenses —Federal Rules of Criminal Procedure Rule 14>
2 : to injure or damage (rights) by some legal action or prejudice <that the denial prejudiced his right to a fair trial> <this clause does not prejudice other rights>


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Note added at 31 mins (2008-01-17 12:38:57 GMT)
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то есть, в итоге, навреное, можно и так:

обязуется .... не совершать умышленных действий, причиняющих/наносящих вред/ущерб

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Note added at 1 hr (2008-01-17 13:12:10 GMT) Post-grading
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post grading: Thank you!