What would happen if you was to cash a check, didn’t realize it was
to you and your finance company, take it to a local business that has
a money center, they cash the check without even having you sign let
alone having the finance companies endorsement on it . The money
cleared my account like a couple months ago and it was just brought up
now .. ?
The reason why the check was made out the owner and the lender is to make sure the repairs were done on the car. The lender wants to make sure that their investment is protected.
For example: you get a six year loan on a new car. In the second year you get hit by another driver. The damage estimate is $1,000, and you decide it doesn't look that bad, so you decide to skip the repair and spend the money on paying off debts. What you don't know is that if they had done the repair they would have found hidden damage and the repair would have cost $3,000 and would have been covered by the other persons insurance. Jump ahead 2 years, the rust from the skipped repair causes other issues. Now it will cost $5,000 to fix. The insurance won't cover it, and now a car with an outstanding loan balance of $4,000 and a value of $10,000 if the damage didn't exist needs $5,000 to fix.
The lender wants the repairs done. They would have not signed the check before seeing the proof the repairs were done to their satisfaction.
But because the check was cashed without their involvement they will be looking for a detailed receipt showing that all the work was done. They may require that the repair be done at a certified repair shop with manufacturer parts. If you don't have a detailed bill ask the repair shop for a copy of the original one.