Here is the description of placeholders you can use in customising email
Subscription Fields
| Field | Description | 
|---|---|
| {subscription.id} | Unique subscription identifier | 
| {subscription.user_id} | ID of the user who owns the subscription | 
| {subscription.user_email} | User’s email address | 
| {subscription.created_at} | Date and time when the subscription was created | 
| {subscription.updated_at} | Date and time of the last update to the subscription record | 
| {subscription.payment_system} | ID of the payment system (0 = Stripe, 1 = Paddle, 3 = PayPal, 4 = Primer, 6 = Solidgate) | 
| {subscription.payment_system_label} | Name of the payment system (Stripe, PayPal, Paddle, etc.) | 
| {subscription.real_payment} | Indicates if a real payment has been made | 
| {subscription.pay_system_id} | Subscription or customer identifier in the payment system | 
| {subscription.project_domain} | The domain of the project/website where the subscription was created | 
| {subscription.quiz_id} | ID of a quiz | 
| {subscription.quiz_name} | Name of the quiz | 
| {subscription.paywall_id} | ID of the paywall | 
| {subscription.paywall_name} | Name of the paywall | 
| {subscription.price_id} | Price ID | 
| {subscription.amount} | Final amount of the Price used for this subscription * 100 | 
| {subscription.amount_real} | Amount of the Price used for this subscription, including discounts | 
| {subscription.currency} | Currency | 
| {subscription.canceled_at} | Date of cancellation (if canceled) | 
| {subscription.cancel_at_period_end} | If the subscription ends at the end of the current paid period | 
| {subscription.customer} | Customer identifier in the payment system | 
| {subscription.status} | Current subscription status (active, canceled, trialing, past_due) | 
| {subscription.next_charge_date} | Date of the next scheduled charge | 
| {subscription.last_charge_date} | Date of the last charge | 
| {subscription.charges_count} | Total number of charges made for this subscription | 
| {subscription.total_revenue} | Total revenue of this subscription in subscription currency | 
| {subscription.manage_link} | Link where the user can manage their subscription | 
| {subscription.total_revenue_usd} | Total revenue of this subscription in USD | 
| {subscription.user_visit_id} | Identifier of the user’s visit/session (for analytics) |