A couple broke a rule of wedding etiquette. But what the newlyweds did was much worse.

Committing to a wedding when you have kids can be a tricky situation, particularly when you’re children aren’t invited to the wedding in question.

Wedding guest, Jessica Baker, was recently faced with this exact challenge. She was invited to a family wedding where kids weren’t invited. She said yes to the RSVP but didn’t end up attending.

Some might say she broke the code of wedding etiquette.

But later, Baker received an invoice in the mail charging her for her non-attendance.

Baker spoke to Kare 11 News and said that her mum was supposed to be watching the kids for her, so that she could attend the wedding with her husband.

"She [Baker's mum] called at the last minute and had something come up and said, 'I can't make it'," Baker told the news show.

Baker said that since the invitation said no kids, that meant it was no wedding for her and her husband.

She was shocked to get an invoice in the mail this week from the couple who's wedding she didn't attend. The invoice was charging her for the two meals her and her husband would've eaten, plus a taxes and service charge.

The invoice has since been shared on social media, with a lot of advice from outsiders about what she should do.

The total of the invoice was $75.90.

The invoice says, "This cost reflects the amount paid by the bride and groom for meals that were RSVPed for, reimbursement and explanation for no show, card, call or text would be appreciated."

Baker has no intention of paying the fee, but she's not sure what the right course of action is. "I guess I don't know... what the right thing to do would have been," she said.

The Editor of Minnesota Bride Magazine, Sarah Baumann Rogers, spoke to Kare 11 about appropriate wedding etiquette and shared whether she though it was a fair move on the bride's behalf.

"Under no circumstances should you choose to follow up after the fact...kind of questioning why they couldn't attend or much less sending a bill," she said.

She did see why couples would be annoyed though. Weddings are expensive and it would seem to them like money had gone to waste. So she believes all wedding guests should notify the couple that they cannot attend as soon as they know this is the case.

Baumann Rogers also said that couples planning a wedding should prepare for a 10 per cent overage or 10 per cent underage always.

What do you think? Was the invoice fair or not?

TAP ON THE IMAGE to see some quirky and hilarious wedding invites people are sending out...