I am in the process of applying for the K1, for my fiance who lives in the Dominican Republic. I am a US citizen, and I do have a passport, but my certificate that was issued to me was lost many years ago. I already applied for a replacement using form I -535, but it has been 8 months and still waiting patiently for the replacement. My question is, where else can I find my certificate number instead of waiting for my replacement certificate to arrive? Any help would be greatly appreciated.