When I got my ScubaPro regs serviced for the first time a couple months ago, the parts cards were not even needed. Heck I don't even know if the shop checked on the serial numbers. The shop simply wanted to see the origional reciept, or a copy of it. After they were serviced, they gave me a reciept from this service. If I go to the same place for service next year, I do not need this reciept. But if I take it somewhere else, I need to provide the reciepts from previous years service.
So what I gather from this experience is that if the regs are serviced at the same place every year, they keep a record for you. But if you get the regs serviced at different places it is completly up to you to provide records for the service.
So what I gather from this experience is that if the regs are serviced at the same place every year, they keep a record for you. But if you get the regs serviced at different places it is completly up to you to provide records for the service.