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We have a product registration form and each product would have a set of four fields:

Product Name
Serial Number
Date purchased
Dealer purchased from

In some cases a customer would like to register multiple products so we want to be able to have the four fields and then a button that would be “Add another product” and the four fields above would be repeated.

Ultimately a visitor might do this several times, then complete some contact fields and hit submit.

Ideas on how we achieve the above?

Thanks

https://wordpress.org/plugins/contact-form-7/