Hi @Bertaulieres,
Welcome to the community and thank you for your post.
This feature is not available on PayPal I'm afraid. If you wish your clients to pay a deposit, you could send them an invoice for the specific amount, however, they will be charged once they choose to pay the invoice. You can personalize your invoices so the customers are aware that it is for the deposit. For more information, please click here.
I hope this helps!
- Rachel
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