# CF410

Source: https://xmlvalid.com/rules/CF410

> Enter valid phone number - …: digits with an optional leading plus, no spaces, dashes or brackets.

- Level: error
- Rule sets: MyInvois validations of LHDN (Malaysia) MyInvois SDK of 25 September 2026
- Context: `/*/cac:AccountingSupplierParty/cac:Party | /*/cac:AccountingCustomerParty/cac:Party`
- Test: `$phone = ('', 'NA') or matches($phone, '^\+?[0-9]+$')`

## Why it fails

- A phone number written with spaces, dashes or brackets: +60 3-7654 3210.

## How to fix it

- Write the digits only, with the country code after a plus: +60376543210.

Validate a document against these rules: https://xmlvalid.com/validate