# Make it work better

Do some front-end validation according to the rules below. Avoid frustrated shoppers and hide Ratepay's payment methods in any other case. Our Payment methods are available to your shoppers with the following restrictions:

| Validation | Content |
|  --- | --- |
| Postal Code | DE: 5 digits, numbers onlyAT, CH: 4 digits, numbers onlyNL: 7 digits, letters and numbers |
| Currency | EUR in DE, AT, NL, CHCHF in CH |
| Shoppers | Must be at least 18 years old |
| Phone Number | 6 or more digits, can contain the following characters:012345678 +/-() |
| Bank Account Owner | = Invoice recipient |
| IBAN | Letters should be UPPERCASEAT + 18 digitsDE + 20 digitsNL + 18 digitsCH + 19 digits |
| Shopping basket | must have a minimum amountmay not exceed a given maximum amount |
| Delivery Address | Billing address and delivery address needs to be equal |
| Delivery methods | Express Delivery (24h, 48h) is not supported |