Enforce New Required Field on Membership Renewal

I was understanding it that you don't want any of those fields to be empty. So you're wanting to check that at least 1 has a value? If you use OR you'll have to duplicate the 2 AND conditions already supplied because it groups the entire AND blocks together. It works like the following.

( CONDITION_1 -AND- CONDITION_2 ) OR ( CONDITION_3 -AND- CONDITION_4 )

So another way to keep this simple is by stacking substitutions. The below for example should do that.

Field: Custom > Value
Custom Value: [field_name_1][field_name_2][field_name_3]
Operator: Is Empty

Replace field_name_1, field_name_2, and field_name_3 with the actual names of your fields. If none of them have a value the redirect should then apply.

Thanks. I didn't explain it well.

What I want is to trigger if any of them doesn't have a value. You first suggestion triggers is none of them has the value (if I parsed it correctly).

Only way to do that is OR conditions. So you'll need to make more OR rows, add the 2 AND conditions that I've already added for you, then add a 3rd AND condition to each OR row checking your fields. This should result in the following.

( PLAN_ID_CONDITION -AND- PLAN_ACTION_CONDITION -AND- FIELD_1_CONDITION )
OR
( PLAN_ID_CONDITION -AND- PLAN_ACTION_CONDITION -AND- FIELD_2_CONDITION )
OR
( PLAN_ID_CONDITION -AND- PLAN_ACTION_CONDITION -AND- FIELD_3_CONDITION )

This can be simplified to the following though.

( PLAN_ID_CONDITION -AND- PLAN_ACTION_CONDITION -AND- FIELDS_CONDITION )

It however requires using a Code condition and utilizing PHP. The below should work.

Field: Custom > Code
Custom Code: Operator: Equal To
Value: 1

Add as many field checks there as needed. Both should accomplish what you're wanting so feel free to use whichever method feels more comfortable to you.