1. Login to your FreshBooks account and select 'Settings' in the top right corner
2. Select the 'Emails' section of the settings on the right side of the page
3. Select 'edit' next to the New invoice email
4. Create your custom Freshbooks Payment Plan Offer URL in your Partial.ly account
First, select the offer from your Partial.ly account that you want to add to your invoices. (click here for information on creating an Offer) From the Update Offer page, use the Integration Tool on the right side of the page.
Then select 'In my FreshBooks invoice emails' from the 'I'm going to this URL:' dropdown. Once selected, the custom URL will automatically generate below in bold. Copy and Paste the URL link to place in your FreshBooks invoice emails. Remember to add additional text such as: "To pay for this invoice with a payment plan, click the following link"
5. Add your custom Payment Plan Offer URL to the text of your FreshBooks New invoice email.