>If I install this plugin will it resolve the issue

depends on what the issue is….(in any case, it’s not my plugin so i have no idea)

>Can block this individual accessing the domain.

not if he/she then just uses a proxy or has a dynamic ip address or uses any other ip spoofing …

what’s worse, if you block an ip address and that ip is – at some point – allocated to someone else you will block that someone else who has done nothing wrong…

in short, this is a very crude way to do this.

if your client really gets a lot of fake orders, i would – if i were him – only accept credit card payments. not 100% foolproof of course as cc’s can be stolen etc, but a much better approach i would have thought

you are misunderstanding.

he/she would have to hack the core files (which is never a good idea)

no, it doesn’t work like that

please see here:
https://support.wp-pizza.com/topic/force-registration-before-ordering/

[email protected] is very unlikely to be the email address associated with your paypal account. you must enter the right email address in the paypal gateway settings field(s)

please , next time give me a link to the actual direct pagelink on your server where your categories/items are.
having just the homepage link makes me have to search through all of your pages to find out where stuff is

assuming we are talking about this one – http://staging.smithstreetdeli.com/?page_id=194 – it doesn’t really tell me much as it looks just fine to me. what i *WAS* referring to above regarding screenshots was the *admin* side of things regarding what your categories look like and in fact what shortcode(s) are you using on that page

if it’s easier for you, you can/could also reply to below with access details to your WP admin so i can have a look myself in the backend .

just make sure you set it to be a “private reply” if you give me admin access/details

>Is there a limit to the number of menu items or categories that can be used?

no (unless something else is limiting it somehow)

do you have screenshots of what exactly you are seeing (or not seeing) where ?

although not sure why anyone would really want to do that , you could do the following

just do not use the dedicated email field in wppizza-> order form settings as email, but one of the other/custom ones.
no email will be sent to the customer (as the email field is essentially not set)…

huh ?
what accordion ?
sorry, i don’t think i understand the question

although possibly true, i have no idea at this time when that may be, as there are other “fish to fry” that may be more useful to more people …