Receiving and requesting money with Paysend Libre

• How do you receive money sent with Paysend Libre?
• Do I need to download the Paysend app to receive a payment?
• Can I use Paysend Libre to request money from someone?
• Can I receive Paysend Libre payments from more than one sender?
• If I don’t accept a payment with Paysend Libre, how quickly would it be returned to the sender?