I'm honestly requesting the same thing as I've carefully researched products I would like and think would be best! The only things I have leniency on is clothes. I know my mom and nana have been getting some stuff from thrift stores which I don't mind.
Asking for gift receipts feels a little gauche, but I think respectfully requesting that people order from the registry or offer an alternative like diapers or gift cards for wherever you're registered would be reasonable. It seems like it should be obvious that if you list a registry on the invite that's what people should stick to, but it feels like a lot of social etiquette has gone down the drain. Make sure there are plenty of lower priced items on the registry. I often combine multiple smaller items for gifts if I can spend more.
Why would people deviate from a registry 🙃 they should just donate to the diaper fund lol
I don't think it's rude at all! We ended up with so much stuff we didn't use or need because people deviated from our registry.