Hi. the address I use to use was <serviciofotocontador@gasnatural.com>, but in may they sent me an e-mail and told me to download an app, which is YoLeoGas, and to take a pic of the meter using this app, I have downloaded the app but haven’t used it yet, has have not been back to the apartment, I will be there at end of September so will try it out then, hope this helps