I am stuck on this challenge. I have attempted to create validation rules as instructed, but I keep getting the error below.

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Here is a screen shot of my validation rule:

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I have tried different suggestions from other posts and it doesnt seem to work. I will appreciate help on this.

  • Add one more condition in this rule. It should fire when mailingpostalcode is not blank
    – Ashwani
    Commented Jan 21, 2017 at 15:03
  • Thanks but I am not sure I under would you mean by "it should fire" and require further clarification on this
    – 0xsegfault
    Commented Jan 21, 2017 at 15:06

1 Answer 1


This is a standard Required Field error, probably created from a different trailhead challenge. Go to the MailingPostalCode__c custom field, and remove the Required attribute.

  • Spot on!!!! Thanks for saving loads of frustration!!
    – 0xsegfault
    Commented Jan 21, 2017 at 15:09

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