As in, a method of asking a halachic question to a qualified halachic expert Rabbi, anonymously.
Is there a collection of verified, reputable "anonymous shaila lines", by country or city? If not, could this question serve as a place for one in the meantime?
If so, please provide what anonymous shaila lines you know about, ensuring to include their location, the number, email address or website link, what minhagim they cater for (e.g. sefardi, ashkenazi, etc), and what establishes their reliability (the last one is essential for the answer to remain on topic on Mi Yodeya, otherwise it will just be opinion based).
Feel free to also post any references to halachic discussion about asking anonymous shailas. It seems like a fairly new thing to me, I would be glad to see some responsa on it, if it exists. Thank you.