First you must make sure you have a Mexican bank account that allows you to make payments to CLABE numbers or transfers to third parties.
1- Access your bank's app and select new transfer or send money.
2- Write the name of the recipient of the account as well as the interbank CLABE number, these previously received in your remesita.com payment instructions
3- Write the exact amount to pay and be sure to put it in the comments of your transfer, the reference number of your payment, that appears in the payment instructions.
4- Make the transfer and upload a screenshot of your proof of shipping in the button that appears within the payment instructions.
5- Ready, payment completed satisfactorily, you just have to wait for confirmation of receipt from the Remesita team.