Terms and Conditions

Payment Methods

Paypal Account

Proceed through the check-out and select the PayPal option. Orders will be shipped out once PayPal confirms payment.

Credit Card or Bank Account

Proceed through the check-out and select the PayPal option. On the PayPal payment page, go to the section labeled “Don’t have a PayPal account?” and proceed using your credit card or bank information. Orders will be shipped out once PayPal confirms payment. (Note – this may not be available in some European countries.)

Check or Money Order

Proceed through the checkout to select this method of payment. Once you check out, please mail payment to Interlit Foundation along with a copy of the order you placed. Once payment is received by Interlit, your materials will be shipped.

Invoice Payments

If you have received an invoice directly from Interlit Foundation, you can make your payments by clicking here. This payment option is only for direct invoicing from Interlit Foundation and is not intended for online purchases.

Shipping Your Orders


Orders are shipped out within one or two days, except on holidays

USPS Shipping

Materials are usually shipped by USPS media mail and arrive in 3 to 5 days within the USA. We use USPS media mail or Priority Mail rates whenever possible. Shipping rates are calculated by the post office at time of checkout,

International shipping takes longer. If you need books urgently, please send an email before ordering and we will respond with your options for a quicker service.

Audio Files

All audio products will be delivered as MP3 files that you can download.

If you specifically require an audio CD, please send an email after completing your order.


Returns Authorisation

Before returning any merchandise, please contact Interlit.

Terms of Return

You may return new, undamaged materials within 30 days of delivery for a full merchandise refund. As we are a non-profit organization, we will be unable to reimburse any of your shipping costs (receiving or returning). If you are returning items due to a shipping error on our part or due to defective merchandise, we will pay the shipping expenses.

Privacy Notice

How we use your Personal Information

The personal information that you give us when you place an order, send us a letter or email is not shared with any other organization, business, or website.

We use the personal information we collect to process your order, identify you within our system, and to contact you, if we have questions about your order. This information is not stored for future use but will be archived by us for a limited period of time.