eon

[lyric ermine]

It's practically not possible, since PaymentLink is a link you share with multiple people (They all see the same URL) and each of them trigger a different transaction.

If you want a associate a customer profile, Checkout would be a better option. It has the customer field to feed in the customer id, and yes it requires code but just a few very simple lines

[zenith crest]

Gotcha, so no way to be like "if the customer has entered the same email address as an existing user, use that one"?

[lyric ermine]

Yes, unfortunately