If someone who is not the beneficiary uses the T-16 and this is proved by an inspection team, a penalty may be imposed and the card will be blocked for 3 years, according to the T-mobilitat use conditions, approved by the ATM.
If the person wants to use it again, will have to ask for it to be unblocked by appealing. This can be done using the oficial "Generic request" form of the Generalitat de Catalunya, choosing Autoritat del Transport Metropolità (ATM) Àrea de Barcelona as an addressee organization: together with your details, you must explain in detail the reasons for making improper use of the pass, and attach any documents proving the reasons you give. You can get the form on the following link.
You can also submit the form in person at the public offices that you will find on the following link, according to the 39/2015 Law.
You will get an answer within three months. If your appealing is rejected, you can submit a hierarchical resource during one month after the reject notification, on the same channels. ATM will answer you within three months from the date of the ATM Executive Board meeting.
If the resource is rejected, the card will be blocked for 3 years, according to the T-mobilitat use conditions, approved by the ATM. But keep the card, because you will be able to use it again after the 3 years. You can contact to T-mobilitat customer service channels, and we will unblock the card.