The PayPal assistant contains the option Address validation in the section Order processing. This validation is automatically activated. You have to select to deactivate the validation. You can either deactivate the validation for selected or for all countries. To do so, check () the countries for which addresses are not to be validated.
If the payment should also be executed with an incomplete address you should deactivate the address validation.
The default validation is a PayPal requirement. The validation checks if there is a complete address. It is not validated whether this is an actually existing address. The payment is only executed successfully if there is a complete address.
The PayPal address validation is important for the coverage when shipping goods. Moreover, PayPal offers buyer and customer protection, which is especially important when orders are processed with PayPal Express. In this case, the address is transmitted by PayPal itself.