Yes. Not all spending can be deducted. But for the ones you do, you have the right to ask for the "electronic invoice" and the business has to give it to you.

When that happens they ask you for your TAX ID and then the business generates the invoice and your taxid and their taxid makes the tie. The Mexican IRS systems see all of this. So at the tax reporting moment, the system will have all that info.

It is pretty neat actually. However I think it is possible bc in Mexico people are not that concerned with privacy and all that.