yes.. you must have that letter of support from philippine embassy in doha they had this format which your husband must send it to you immediately..or let your husband ask the embassy if it is possible to have it scanned and email to you.

they will also check your marriage cert. original so keep it ready..do you have the visit visa sticker pasted on your passport other than the certificate visa? or known as the blue visa?

copies of your hubby work visa and passport...hope this helps...