What's the penalty for an expired 6 month tow-car permit?

Good homework.

So the end result is that IF their TIP expires, they can get a permit that will allow them to legally drive to the border.

So it sounds like they have options. Stay, and when heading to the border, getting an extension that will allow them to get to the border legally. Or, driving to the border, turning the TIP in and returning (time frames and location up to them) with a new TIP and visa. Options.

A few years ago, we got caught in a situation where we sold an RV that we didn't expect to, and didn't turn in the TIP.

We did everything we could do to get the permit cancelled, and it did not work in the end. Everything.

Fortunately, someone, navagator maybe? posted a website that showed what vehicles were attached to your passport number. I'm not finding it in my bookmarks, but could if really necessary.

It showed the old RV on my passport number. When I got a new US passport, I got a new number and was able to get a new TIP with no problem because it was a new number.

We are not encouraging anyone to get a new passport in order to erase old TIP's, but it can be done.

Advice perilous because if it goes public the government will find a way to enhance the banishment to the point of making a ban a lifetime issue regardless of circumstances. Knowing Mexico the following will come into play...

"Your passport was issued 2 years after your delinquency. Your name is the same. Other data like license plate, VIN or driver license have tripped warning signals in our system PROVE YOU ARE NOT THAT PERSON!"

Be careful and not throw the baby out with the bath water.

One of us is bound to find the appropriate website.

One has to interpret what they mean in the document that specifies the Importation Permits from SAT.
Roughly translated it states that you can only get one Temporary Import Permit in one year, that you can take the vehicle out of Mexico and back in as many times as you want within those 180 days and until the 180 days have been used up, this is written in the SAT document from SAT on importing foreign vehicles in to Mexico.
As you know Mexican law makers and lawyers love to use a lot of convoluted words to say something very simple so that they only can interpret the law and charge lots of pesos for a simple answer, too many lawyers steering the pot.

moisheh, I hope you read and understand Spanish, this is taken from SAT document on the internet.

www.sat,gob.mx/aduanas/vehiculos/importacion_temporal/Paginas/default.aspx
Go to Aduanas and scroll down to vehiculos

The law for the Mexicans importing vehicles applies the same for foreigners that have a TIP of 180 days

navegator

Mexican cars with FRONT
FRONTERA license plates have to undergo precisely the same set of hurdles as do extraneous cars. The only difference is if they default on a really expensive high demand motor vehicle, Mexico can rave on their Mexican bank issue credit card. Aduana can not do that with an extraneous bank card.

This is why I caution folks who are clearly in default, to NOT stop at the Aduana/ Benjercito station on their way home and try to argue about the default. Once Aduana/Sat gets their mitts on you and the car then they can assess on-the-spot fines and penalties. Because of bulls-butt-in-a-fly-hatch tightness about car permits, mordida is out of the question with delinquent permits. There is nothing the border officials can do -- think of it this way...

Farmacias Similares...

25% Off Monday. If the computer link to Mexico City fails there is no discount. All the work and the receipt is handled by Mexico City tied into the computer of the sucursal (chain store).

Once the deliquincy happens, the response in the computer system is AUTOMATIC. No one can stop it. No one can alter it. Only the elaborate check-out system given vehicles on the way out can alter the deliquincy. It's all about avoiding fraud and corruption. The INSTANT the alarm is given there is no way to reverse it. Like a hand grenade with the pin pulled, and the handle dropping into a well.

Like the roadside SSP checks, where TIP information is submitted. If a query is made and triggers the alarms. the personnel at that reten had damned well better be sending that vehicle to the Corralon Federal. If it does not show up things get ugly for the cops. And it's all instigated and controlled by that computer in Mexico City. Bribes are as useless as a kiss on the cheek.

Aduaneros can be sympathetic and very helpful as long as the deliquincy seems to be other than don't give **** or arrogance. When permanent residency extraneous were told to get their USA plated cars out of Mexico, there were hundreds of defaults. So the process of the temporary exit permit is not unplowed ground.