You are required to specify your mailing address in your Form I-90 application, and there is the “In Care Of Name” field in the Mailing Address sub-section under section 1. You should fill out the “In Care Of Name” field when someone other than you will receive a mail with your green card. As suggested by the Form I-90 instructions, this field may be left blank. We recommend, however, that you write your full name into the field. You can also use an urbanization name such as “Urbanizacion Los Olmos” or similar, which is commonly used in urban areas of Puerto Rico.