You can complete the Tourist Card (Official Entry Immigration Form) online before departure. Be sure to enter your name as it appears on your passport and to follow the instructions
Presence of Sargassum in Mexico and the Caribbean
Depending on the weather conditions, winds and tides may bring large quantities of Sargassum to shore. Since seaweed moves with the ocean currents, quantities may vary by place and day. Transat would like to inform its clients that this natural phenomenon beyond its control affects several parts of Mexico and the Caribbean. Although the presence of this brown seaweed is greater than usual, our hotel partners are making every effort to clean the beaches when necessary.