This has happened a few times now with different parties for my DC where one or two of the invitees have turned without even a card. On one occasion, the parent had not even replied, DC just turned up empty handed. These parents have never struck me as struggling for money and card can cost only 50p anyway. I would never send my DCs to a birthday celebration without a card and a present. Smacks of 'can't be bothered' to me and complete arrogance.
AIBU?