Richie, it depends on what it is.  I recently had a seller want to lower the list price. Comps support the list price.  I all but begged her not to lower the price. She insisted. In the listing modification addendum, I noted that lowering the price is against the broker's recommendation.  

Whatever it is, gets fully documented in writing.  

How serious of a disagreement, Richie? 

    If I feel that the client is damaging himself/herself, I may put my advice in writing or otherwise document that "I warned them".

I recently had a client suggest that I stretch the truth. I refused and told him I was not about the do what I deemed was dishonest. We moved forward and the transaction has closed.

It is the client's home or buyer's desire to buy. If they insist on doing what I deem to be unwise, I will probably go along after giving my advice, expressing my opinion (both of those in writing) and as long as what the client wants is legal and ethical. I can't fix their poor judgment.

Another alternative is to offer to end the relationship. Are you willing to cancel a listing over a difference in opinion? Are you willing to recommend to a buyer that they seek a new agent over a difference in opinion?

My fiduciary duties to my client never override their decisions.

I am not shy, they will get my professional opinion.  And then they get to make an informed decision.  If they choose to ignore my input, that's entirely up to them.  I have done my fiduciary duty by giving them the benefit of my expertise.  Period.

I will not work with people playing fast and loose with truth, law or ethics, and have fired people for wanting to be on the wrong side of the line. I don't even want to be around people like that.

In the words of one of the best real estate defense attorneys in our state, the greatest risk reduction tool is client selection.

Not too very long ago, I disagreed with the seller's request. When told  I was working for THEM...I replied,...not anymore.

It would all depend on what they are asking.

If we know of something that should be disclosed, we are obligated to disclose it or risk losing our license.  I would not work with a client that is willing to put my license at risk.  I would also get a legal opinion before making any final decision.

I am generally successful at educating our clients to do the right thing.

The client is in charge of their decisions but if that decision conflicts with me/the brokerage or statutory requirements then I can decide to agree or dissolve the relationship.  This is definitely an "it depends" situation given the information you have shared.  

I'm in agreement with John Juarez.  You make your recommendations, but it's the client that calls the shots.  So long as it's nothing unethical or illegal, I don't see any reason not to comply.  Document your disagreement in an email or on a form, if it's significant enough.  Termination of the relationship is warranted if the client wishes to do something illegal or unethical.

If they are going to break an ethical rule or the law - if they plan to deceive or become liable to get sued,  I'm the prevailing authority or I'm gone.

If it's about something debatable, I have them sign a hold harmless - "acting against the advice of their agent"  and let them head-butt the proverbial brick wall I tried to steer them away from.

That would all depend if it was legal or not. But if it was legal and against my advice, I would have them write out the instruction (somewhat like a waiver, but fo me) and have sign it. 

Depends on what it is. Price reduction after so many days at their price. I do & have told sellers & buyers what would be in their best interest & sometimes you just have to leave it at that.

COE requires that we follow our clients' lawful instructions. If it's about property condition disclosures we must disclose if we know whether they want us to or not. If clients resist my best advice I do codify it in writing so there's no misundertanding in the future. My fiduciary responsibilities do not extend to doing anything illegal or unethical.

Depends on what it is, and if it is in their best interest or legal.   I always encourage an open conversation, so we would talk about whatever they are thinking.

As Kathleen Daniels, Probate & Trust Specialist and Fred Griffin Florida Real Estate stated, doument, document, document.

As long as what they are asking us to do is not immoral, unethical, or illegal we are bound to comply with their wishes

I won' allow known fraud to exist on any transaction I'm involved in.  A client I represent will be honest if answering a question or disclosing a condition or I will need to lose the client.  My license and honor are far more important to me.

We can offer advice, but at the end of the day it's the client's decision. If we strongly feel it is not in their best interest, we should have our recommendation in writing to document it.