I also use QuickBooks which automatically keeps track of the invoice numbers.
Wonderful thing to do; rescue horses!
Last October I rescued a 7-year-old Arabian mare, unbroke, not even halter broke, never de-wormed, and never had her feet trimmed, there were a total of 25 that were rescued from that breeder. She scored a 2 on the
Henneke Body Condition Chart and now scores a 5! As of May 8th, she is mine! The owner is serving a 20 day jail term, is never allowed to own or harbor a horse again, fined a measly $1000, and his 3 dogs were removed from his 'care' also!