English to Spanish Law/Patents Law (general) Court Documents

Hello again (this is a follow-up to a very similar question I just posted):

I'm proofreading a translation of some court documents into Spanish. One document is titled "How to ask the court to reduce or waive your legal financial obligations" ... and we also have the phrase "a reduction or waiver of your legal financial obligations" in many places

The translator used the word "renuncia" for waiver, and I don't think it fits in this context. We use "renunciar a sus derechos" in court when talking about a defendant's waiving (giving up) certain rights when pleading guilty, but I think there is a difference here when the court waives a fee or other obligations.

I know that the terms "waive" and "waiver" have been asked before; I am posting this question to see if I can get some fresh perspectives. The verbs "exonerar" and "dispensar" and "eximir" have been suggested ...which would be "exoneración" and "dispensa" and "exención" if we're looking for the noun. I'm just not sure which is the best choice.

(I previously posted a question asking about the translation of the verb "waive" because this term also appears in many sentences in these documents.)

How would you say this entire phrase "a waiver of your legal financial obligations"?

Thanks again for your help.