Why finalized deal calculations should not be silently editable

The problem with editable deals

If anyone can change a signed deal’s price, rate, or fees after the fact, the system can drift from what the customer signed. Commissions, gross, taxes, and BHPH balances all depend on those numbers, so one quiet edit ripples through the books, and nobody can later show what was agreed.

What a locked deal protects

• The customer: the signed figures are the figures on record
• The dealership: a clear answer when a deal is questioned
• Your books: gross and commissions are based on the final numbers
• Your team: no guessing which version is correct

How corrections should work

Real corrections are still needed. The right way is to add a dated, reasoned change, an amendment, a void, or a reversal, next to the original, rather than overwriting it. Anyone looking later sees both the original and why it changed.

How ClozBox does it

ClozBox calculates deals in exact cents and shows the result for review before signing. The printed signing packet must match the deal exactly as it is; if anything changes after printing, you print again. Finalizing the signed deal locks its terms and stores the calculation together with the calculation engine’s version and a checksum, so the stored result can be shown to be unchanged.

After that, changes use amendments, voids, or reversals with a reason. Audit records are append-only and linked together, so history cannot be quietly rewritten.