My brother is refusing to fulfill his promise to our late mother. Advice?

Scatter them yourself. You can't make someone fulfill a promise like that. It isn't a legal issue, so just do it yourself.

And for heaven's sake, leave the neighbors out of it.

This is a terrible idea, scattering Moms ashes from a plane is an absurd promise and is not a hill to die on. Your brother has made it clear he doesn’t want to be involved and after five years it’s time to either give it up or do it yourself.

Put mom‘s ashes in the car and go to one of her favorite places, scatter and say goodbye and be done with it. Then put it behind you.

Easy peasy.

Your brother obviously does not want to do it. You need to accept that. It's OK that her wishes are not going to be carried out. It's a bit much, IMHO. 5 different places from a plane? Pretty elaborate plan. He probably just said yes to be nice and not upset her.

Figure out what YOU want to do with her ashes. Make a plan and do it. Do not spend a lot of money on it.

Forgive your brother. And yourself. Let it go.

I will be very honest to say I don't believe this is a real post. We all have an opinion, and that's mine.
However, on the off chance it IS real, I'll use my opinion to tell you I think is despicable to draw other innocent victims into a fight that is one's own. Your fight with your brother may be sad, but bringing your deceased Mom into it in this manner to my mind is reprehensible.
Apparently you know where your brother lives well enough to know his neighbors? I can't imagine it would be then difficult to find out his own address. Do that and send a note that you will mail the ashes to him, but if he doesn't respond, or your mail returns, in 6 months you will yourself fulfill your Mom's wishes. Or HEY, how about just DOING that. With LOVE. With joy. In beauty.
Given you are a new poster, and THIS is what you bring to us, I cannot help but be convinced you're just trolling about. The New Year seems full of it. It can be fun, but it gets old quick.
Thomas Lynch, a famous poet and undertaker has an expression. "The dead don't care." And to my mind, they don't. If you are a believer then you must know your mother now has perfect understanding. If you, like me, are an atheist, then you KNOW she doesn't care. So why not leave your mother out of this, and seek counseling of ministry or medical to help your own obvious pain.
I wish you peace. I hope you will leave your brother (and his neighbors) to his own peace.

Totally wrong to call his neighbors and rude.

Sushi, do you know the places your mom selected? Hire a small plane and do it yourself -- if that's what you can live with long-term. No point in triangulating neighbors into the situation if bro has decided he's done. It's not right, but there's nothing you can do about bro's behavior since your mom passed. Decide what you can live with. Your mom understands, either way.

How would you go about contacting your brother's neighbors? It seems odd that you'd have their names & phone numbers or addresses to be able to do that..........
In any event, your brother is already refusing to speak to you as it is; if you were to try to humiliate him in this way, I can't imagine he'd be inclined to develop any warm feelings for you as a result. Who does such things??? Contacting his neighbor's is certainly NOT your only option in this matter!

You have your mother's ashes at your house; you also know her wishes as to where she'd like them scattered. Do it yourself or realize that the dead do not care about their bodily remains and what is done with them. When in spirit form, what difference does the prior body make?

I'm not sure you're looking for 'advice' as much as extracting your pound of flesh from your brother for him not speaking to you.

**This isn't a 'new account' nor is this the OPs first post. Sushicam has asked/answered 8 other posts on AgingCare in the past.

You cannot force him to spread your mother's ashes and it would be 100% inappropriate for you to involve his neighbours.

You are going to have to take responsibility for compassionately disposing of her cremains.

When my ex husband's Uncle died, I was the person who picked up his cremains. No one in the family wanted to take on the responsibility of placing his cremains, but everyone had an opinion. Uncle Alan was in my closet from 2001 until 2015. In 2015 I brought him to one of the divorce mediation sessions and told the mediator that my ex was to take his Uncle home with him. I was no longer going to be held responsible for him.

I have no idea what happened to the cremains, it does not matter to me.

Promises made between deceased parents and their children are unfair and should not be made, and if made, should not be considered enforceable.

Your mother should not have imposed her request on one (or any) of her children, your brother should not have agreed, you should not feel compelled to expect your brother to do what was asked.

If the decision becomes yours, find a reasonably priced site where you can place the cremains in a niche, or a garden designated for that purpose, or rent the plain yourself.

Hi Sushi,
Since a plane is no longer available, why not sprinkle them yourself, at least at one of the spots? I'm sure your mom wouldn't have minded since the spirit of the thing is kept.
It's petty to try to involve his neighbors in your family issues. I think you're more upset about his not communicating with you, than you are about the ashes. Let the thing with the ashes go--handle it yourself--and re-establish a relationship with your brother. I'd bet that if you asked your mom which would be more important to her she'd choose the relationship between you two.