AIBU to expect payment when my sister's boyfriend used my concert ticket?

So you would have rather no one used the ticket (meaning you got no money) rather than someone you knew did use the ticket (with you getting no money).

That sounds extremely petty. If you didn't know until yesterday he'd used the ticket, then you clearly had no interest in selling it.

Bit odd you would rather it go to waste than have someone use and get the benefit of it.

@ThatHazelWasp it would have been reasonable of you to have told dsis1 straight away that you wanted to sell your ticket since you couldn't use it. Then she could have chosen to buy it from you had she so wished. If she didn't know whether her daughter could attend or not you could have given her a timelimit- get back to me in 24 u if you want to buy it or I will put out an ad.

As things were you let it slide which made your sister reasonable for using it. Had it been me I would have told you straight away if I would want to buy it or not but dsis1 seems flakey and you probably know this so YABU.

You double booked yourself and therefore couldn't use the ticket yourself. As you say he probably wouldn't have gone, wasn't really a fan, I don't think you can expect payment for a ticket a couple of days before the event , which was too late to sell on. It would have been nice if he'd offered to pay half...that would have been generous under the circumstances but I certainly wouldn't have asked him for this.
It was your ticket so you were responsible for selling it ion if that's what you wanted. You should have said to S1 You haven't mentioned if you're taking niece so I'm selling the ticket on now. Do you want it for half price or r not?
Everything has been left to the last minute. In this scenario I would be glad the ticket was being used rather than wasted.
Lesson learnt. Be careful not to double book yourself. Your mistake, you are likely going to be out of pocket. I've double booked myself before op. An expensive mistake ...but my mistake. I was just glad that the ticket did get used rather than wasted 😀

This ^

90% are telling you you're unreasonable and you still expect him to pay?

It's your mistake, by double booking yourself. No one has to compensate you for your own cock ups.

You should have specified you want paying or youbare going to sell. It sounds like you gifted the ticket and so no you cant expect payment.

This is very odd in that you assumed you had lost the money until after the concert and now hope for payment. Definitely wouldn't expect the money from someone who wasn't bothered about going. In your shoes would be annoyed at myself for leaving it so late (and at DS1 for not letting me know sooner) but it can be quite tricky to sell single tickets unless a sold out event (and if it was Harry Styles then loads of resale tickets available)

I think in his head it’s a spare ticket which would otherwise go to waste, so he doesn’t want to pay for it since he’s not too fussed about going. Your sister probably talked him into going. I personally would still pay you, but he might not, especially if he thinks your sister sorted it out for him and paid for it.

I would leave it for now as it’s not worth making things difficult. Next time set boundaries and give a deadline after which you won’t wait any longer and will sell the ticket to someone else. You’ve learned your lesson.

Unless you specified from the start “I can’t go, would anyone like to buy the ticket?”
you can’t now ask for payment.

you clearly gave them ticket to be used without discussing payment

If you wanted to sell the ticket, you should have given your sister a deadline and told her that if you hadn't heard from her about your niece taking it by then, you would sell it. Since you did nothing, you really can't expect the boyfriend to pay for the ticket.

Why, as they didn’t let the ticket go to waste, she wasn’t using it and made no effort to sell it or use or words to let them know she wished to.

I wouldn’t expect payment for some one going last minute because the ticket was spare. If you wanted to get your money back you should have sold it.

I'd say they owe you a favour or a drink

Would you be happier if nobody had gone and your tickets had remained in the drawer at home OP?

I call reverse

You weren’t clear at the beginning you wanted paid for the ticket. You could have resold it on Ticketmaster/Twickets, or offered it to your sister/niece/boyfriend/friend for a discount or even full price, but you can’t really sit there and expect people to throw money at you when it looked like the ticket was about to go to waste.

You should have DS ask early on to confirm if she was taking her daughter, and tell her that otherwise you’d sell the ticket. If you really did intend to charge for DN going you should have definitely made it clear from the start

How much was the ticket?
I would be more annoyed at the sibling dillydallying over her daughter going tbh.

I would offer to pay for the ticket if I was the boyfriend. I wouldn’t expect the money back if it was my ticket though. It’s always annoying to lose money but it’s already been gone for months anyway. Would your sister expect you to pay her back if it was the other way around?

I think it was a bit off to make an arrangement with your DSis to attend an event and then bail on her, would she really have wanted to go on her own, would you have if she had bailed on you? Was the other arrangement more important to you than your sister? Your only concern seems to be getting your ticket money back with no thought for your DSis, you let her down, I guess she was trying to find someone else to go with rather than go on her own. In the past when I had to pull out of an event, due to I’ll health rather than just fancying something else better, I gave my ticket for free to my friend apologised for bailing and said I hoped that she could find someone else to go with at short notice.

I wouldn't expect payment but I was just like you, hanging around waiting for other people and then I learnt to take back control by saying something like "if I don't hear from you by X, I'll sell the ticket on eBay". When someone is keeping you hanging on with something wide open and they won't close it down one way or the other then you have to close it for them.

Did you, at any point, say that you would like to be reimbursed for the ticket?

I’m actually surprised you even wanted money from your niece. I can understand why you weren’t wishing to step up and tell them all you wanted cash. It’s tight and embarrassing