Allowances are used to presell products at bulk quantities (and normally at bulk rates), and then the client can gradually redeem (or consume) the services during a specified period. It is possible to post the revenue of the sales in whole at the time when the initial purchase of the allowance happens, or post the sale initially as prepayment, and then gradually post the revenue to the service revenue as the services are performed.
There are not many extra settings for allowances, except the posting item on the activity type (for the initial revenue sale and consumption adjustments), and the pricing for bulk (qty >1). The first one is only required if consumption is gradually posted.
Basically, in both revenue models the appointment (activity) is created and automatically detects and assigns the Allowance No., and sets the unit price accordingly to match the allowance unit price, thus when consumed, the allowance adjustment entry on the POS should balance the sale to 0. In the revenue model where the consumption is gradually posted, the allowance does not mark the activity as fully paid, and therefore it must be balanced out at the POS to get the revenue posted and „pay“ the activity, so to speak.
At the day of consumption, you pay the activity at the POS, and since it has an Allowance No. associated, it will also create an allowance adjustment entry in addition to the normal sales line of the activity sale.
Then you post the sale, and you can either use the POS command POST or simply press the Cash button, which should show 0 amount, and the sale posts as a zero balance sale.
There is no special tender type required, since the allowance adjustment entry is going through the journal lines (not tender types).
However, if your activity has any additional charges (upsells) assigned, they will be pulled into the POS, since allowance of activity product does not cover any additional retail items, at least not in version 2.0.
Note: In both revenue models the allowance consumption entry is created at the time of booking the services (not consumption/finalizing), since you want to keep track of the usage, regardless if the services have been performed, since most bookings may be done upfront and long before the consumption date.
Cancellation of activity will restore the allowance balance to its prior state. In the revenue model where revenue is posted at consumption, the POS finalizing of the services will update the consumption entries to include the POS receipt/line which closed off the consumption entry.
See the articles listed below for a description of how these sales are operated in the Bookings module, depending on the revenue handling.
See also
Post the Full Revenue at Selling Time ...
Post the Prepayment at Selling Time ...