I saw this post on toyhouse: https://toyhou.se/~forums/71.art-marketplace/28171.psa-paypal-fees-dos-and-donts-tutorial
and thought it would be a good reminder for artists! Especially if there are those who don't know.
You could get in trouble for asking your client to cover the paypal fees. Don't risk that.
Use invoices! And have the "tip" option turned on, so that maybe the clients will decide to add a tip! If the client themselves want to cover the fees, then it's fine! But do not ask them to do so!
Also gifting money is never good when it deals with a service. Do not do that! If you're going to use paypal for your business, you need to