Hide Paid Memberships Pro billing address fields and make them optional. Meant to be used with the Braintree gateway.

wp_head_hide_billing_fields.php

/*
	Hide billing address fields and make them optional.
	Meant to be used with the Braintree Payments gateway.
*/
//css to hide the fields
function wp_head_hide_billing_fields()
{
	global $post, $pmpro_pages;
	if(empty($pmpro_pages) || (!is_page($pmpro_pages['checkout']) && !is_page($pmpro_pages['billing'])))
		return;
?>
<style>
	#pmpro_billing_address_fields {display: none;}
</style>
<?php
}
add_action('wp_head', 'wp_head_hide_billing_fields');

//make sure they aren't required
function my_pmpro_required_billing_fields($fields)
{
	if(is_array($fields))
	{
		unset($fields['bfirstname']);
		unset($fields['blastname']);
		unset($fields['baddress1']);
		unset($fields['baddress2']);
		unset($fields['bcity']);
		unset($fields['bstate']);
		unset($fields['bzipcode']);
		unset($fields['bcountry']);
		unset($fields['bphone']);
	}

	return $fields;
}
add_action('pmpro_required_billing_fields', 'my_pmpro_required_billing_fields');

Know this is old and some options have changed, but this still works for Stripe to at least make them not required. I do this to hide individual fields in Stripe if I need some but not all. I use jQuery which should be pretty standard across payment types:

<?php
add_action('pmpro_checkout_before_submit_button', 'my_pmp_jquery');
function my_pmp_jquery() {
	global $current_user;
	get_currentuserinfo();
	if (!$current_user->user_login) {
		//good spot check if you require registration before payment, otherwise remove IF statement
		exit('<meta http-equiv="refresh" content="0; url=/">'); //headers already sent by PMP so meta refresh to homepage
	}
	//script will hide billing fields and prefill name and email from WP account
	?>
	<script>
		jQuery( document ).ready(function($) {
			var fname = '<?php echo $current_user->user_firstname; ?>';
			var lname = '<?php echo $current_user->user_lastname; ?>';
			var user_email = '<?php echo $current_user->user_email; ?>';
			//console.log(user_email);
			$('#bfirstname').val(fname);
			$('#blastname').val(lname);
			$('#baddress1').parent().hide();
			$('#baddress2').parent().hide();
			$('#bcity').parent().hide();
			$('#bstate').parent().hide();
			$('#bzipcode').parent().hide();
			$('#bcountry').parent().hide();
			$('select[name=bcountry]').parent().hide(); //no id in some versions
			$('#bphone').parent().hide();
			$('#bemail').prop('disabled', 'true'); //disable changing email here if you know they are logged in
		}); //ready
	</script>
	<?php
}
?>

https://gist.github.com/CrandellWS/9a9c82ea5b99cd531e0ec74eb39409b6 @andrewteg thanks

Hi,
how do I set payments fields as not required on pmpro ?

did you manage to resolve that @serieseyw ? I am looking for similar solution

same here, how to make fields not required?