Hi @bymarko99,
Welcome to PayPal's Community Forum! If you're attempting to make a purchase using your bank account, it's best to wait until you have the available funds. This will ensure you avoid any insufficient funds fees that your bank might charge if the funds are not yet available. I have also included information from our Help Center that will provide a bit more detail:
Where is my refund?
What happens if I can't fund my Instant Transfer?
I hope this helps!
- Marina
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