email: Yup.string()
      .email('E-mail is not valid!')
      .required('E-mail is required!'),

  address: yup.string().required('Address is required'),
  city: yup.string().required('City is required'),
  region: yup.string().required('Region is required'),
  country: yup.string().required('Country is required').default('Afghanistan'),
  postalCode: yup
    .string()
    .when('country', {
      is: 'United States',
      then: yup.string().matches(/^[0-9]{5}(?:-[0-9]{4})?$/, 'Invalid postal code'),
    })
    .when('country', {
      is: 'Canada',
      then: yup.string().matches(/^[A-Za-z]\d[A-Za-z][ -]?\d[A-Za-z]\d$/, 'Invalid postal code'),
    })
    .required(),

const phoneRegExp = /^((\\+[1-9]{1,4}[ \\-]*)|(\\([0-9]{2,3}\\)[ \\-]*)|([0-9]{2,4})[ \\-]*)*?[0-9]{3,4}?[ \\-]*[0-9]{3,4}?$/

phoneNumber: Yup.string().matches(phoneRegExp, 'Phone number is not valid')

Plus spécifiquement pour le format de différents pays:

  phone: yup
    .string()
    .when('country', {
      is: country => ["United States", "Canada"].includes(country),
      then: yup.string().matches(/^[2-9]\d{2}[2-9]\d{2}\d{4}$/, 'Invalid phone nunber')
    })
    .required(),

    password: Yup.string()
      .min(6, 'Password has to be longer than 6 characters!')
      .required('Password is required!'),
    passwordConfirmation: Yup.string()
      .oneOf([values.password], 'Passwords are not the same!')
      .required('Password confirmation is required!'),

    consent: Yup.bool()
      .test(
        'consent',
        'You have to agree with our Terms and Conditions!',
        value => value === true
      )
      .required(
        'You have to agree with our Terms and Conditions!'
      ),