One of the most popular ways to do this is via social media.
Here is some guidance from the W-9 form instructions: Line 1 b.
Who Are the Best OnlyFans Accounts? You do not have to show your face on OnlyFans to either broadcast or view.
A bit like when you sell stuff on eBay or get gifted money.
Most importantly, this separates your main checking account from your OnlyFans Baby income.
My advice is to create a brand new checking account and give that information to OnlyFans and Myystar.