If you decide to refund a complete order or do a partial refund with a voucher that the customer may use with his next order, then you only need to choose voucher when asked how to refund.

1. step:

Refund or partially refund the order by clicking either the button Return products (complete order) or Partial refund (part of the order incl./excl. shpping costs)-

2. step

Choose Voucher as refund method. Your customer will receive automatically an email with the voucher code.

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If you want your customer to receive a voucher for other reasons, then do this:

Go to Price Rules --> Cart Rules

• Click Add a new Cart Rule

Open Tab Information

• Enter a Name for this rule
• Generate a voucher code
• Enabling Highlight will remind your customer during checkout of the voucher code
• Enabling Partial use will allow your customer to split his voucher, if the value is greater than the next order's amount
• Leave other entries standard 

Open Tab Conditions

• Fill in name of your customer
• Fill in validity dates for this voucher
• Fill in any minimum amount for an order where this voucher may be applied
• Leave entry 1 for total available and total available for each user

Open Tab Action

• Choose Amount as discount type
• Enter the voucher amount (tax incl./excl. by choice)

Save this rule. Done!

3. step

Send a mail to your customer with the voucher code and tell him, that he may apply this code during checkout in the first step Order detail.