Grrrr Tax receipts info - again pls

[gramma]

I do not include my SIN number on my receipts. Tax return does not ask for my personal information just the amount paid. The only instance where my sin is required is if the client gets audited. In that case i ask for a contact name for their audit and I provide the number to them directly.
In 17 years its never been a problem and I have had several accountants as clients over the years.

[apples and bananas]

When I had my kids in a home daycare I recieved reciepts without SIN on them and was still able to submit them with my taxes.

As a provider I do put my SIN on the reciept, however I don't like to. I'm thinking of getting a BIN instead. Are there any disadvantages to having a BIN?