Update: LHDN MyInvois Portal – New Validation Rules for Phone Number & E-Mail Fields

LHDN has updated the validation rules for Phone Number and E-Mail fields. These changes apply to both Supplier (Business Profile) and Customer details.

If your newly submitted E-Invoices are returning as invalid, these updates may be the reason.

📱 Phone Number Validation Rules

The Contact Number for both Supplier and Customer must follow strict formatting:

✅ Accepted Format:

• + symbol (optional)

• Digits only (e.g. 0123456789 or 60123456789)

• Country code (e.g. 65) is accepted

• Mobile or landline numbers are accepted if they follow the format

• Examples - 
  
  

❌ Not Allowed:

• Hyphens (-)

• Spaces

• Alphabets

• Special characters (e.g. @, #, !, etc.)

• Examples - 
  
  
  

🛠 Example Fix:

Action: Remove all spaces, hyphens, and non-numeric characters from phone numbers before submitting.

📧 E-Mail Validation Rules

The E-Mail Address field is required for both Supplier and Customer.

✅ Accepted Format:

• Must not be blank (For Supplier in Business Profile & Customer in Contact Page)

• No spaces

• Only allows the following characters: @, ., _, -, ;

If your customer does not have an email address, enter just a semicolon (;) to indicate this.

❌ Not Allowed:

• Blank fields

• The word "NA" or "N/A"

• Spaces

• Special characters outside of @, ., _, -, ;

🛠 Example Fix:

🔁 What To Do

Please review and clean up the Phone Number and E-Mail fields in both:

• Your Business Profile

• Your Customer / Supplier contact page(s)

This will help prevent validation errors when submitting E-Invoices to LHDN through Financio.