Invite two brother living together

They should really be sent their own invitations. What if one opens it and forgets to tell the other one about it?

View Quoted Comment Good thought, that is something that would happen!

I sent two separate invites to two brothers living together.

I sent one and put the oldest brother first.

If they're all living in the same house, I see nothing wrong with sending 1 invite addressed to everyone. It seems silly and redundant to send 3 separate invites to the same house... plus those are pricey

We had a similar situation - adult brother and sister living with their dad (their parents are divorced and the mom is the one related to FH so no reason to invite the dad). We ended up sending one invite to them, but put their names on separate lines so that they wouldn't think we thought they were a couple.

Send them their own. I have the exact same situation and sent them their own invite. I also invited 2 sisters that were living together, both got their own invite.
All adults get their own invite unless they are in a relationship or you invite their children. That is the only time you combine.
I accidentally sent the brothers the same save the date and I was kicking myself for it but I made sure to send separate invites.

To add: I also have a cousin living with her father. Still gave individual invites. I don't want her to feel like she's less of an adult or less independent just for keeping her widowed father company

I sent my adult cousin who lives on her own her own invite (obviously) after double checking the address with our grandparents. I also sent her sister, who lives with their parents, her own invite. I got the sister's RSVP, and then the parents parents sent back their RSVP for 3 out of 2 and wrote "+[cousin that lives on her own]" on it so.... I guess it just really depends on who they are as people. You mentioned the one that opened it might forget to say something? I'd probably send one each then to be sure.

They need their own invitations; they're both adults.

This is the one rule where I feel different when it comes to etiquette. I think its fine if they get the same invitation, unless they have dates. For example, we have twin brothers who have a house together with their two girlfriends so we are sending one to twin1+girlfriend1 // twin2+girlfriend2 if that makes sense

I sent one invite to a few family friends whose adult children still live at home with them. I know they won’t be offended...and I know I’ll have a better chance of getting the RSVP back in time with mom or dad filling it out!

I think it’s a know your crowd thing, someone I’m close to I probably would just address one invite for because my friends wouldn’t care, that is if they don’t have significant others. I’m actually in a situation where I need to send 3 invites to one house; two adult children and their dates and their parents.