Help - How do I invoice buyer for increased p&p to Ireland?!

[alwaysalaughtobehad]

Hi! Please help - am getting fed up as I can't work this out. Buyer bought toddler clothing for £1.70. Description says 'UK buyers only I do not post abroad', but now she is asking me to post to Ireland and saying she'll pay the extra postage. I don't mind to be honest except that it is taking so much time to work it out. Have found from Royal Mail website that cost will be £4.05 not £2.85. But I can't work out how to send her an invoice/ or do whatever I need to do so she can pay and I can post it tomorrow morning. Never again will I bother selling swimwear stuff it all went for peanuts!!!

i'm not an expert, but i'd assume you'd log into paypal, click on send and request, and then select create invoice. send that to her paypal email and await the payment

I have a Paypal.me app. You just request the amount.