I send an email to the Mom when a little accident has happened here mostly because the Mom's drop off and the Dad's pick up or vise versa at my daycare. I'm not saying anything bad about men, but sometimes Dads don't relay messages to Moms, you know? I don't have any accident forms and don't feel they are necessary. I only call parents for fever of 101 F or vomiting or excessive diarrhea or something serious. A bump or bruise or little bit of blood is normal for any child and all normal parents understand that. If you have an odd Mom who over-reacts in your daycare my answer would be different.