Will it delay the process if I don't provide my ARN since I lost my green card? (I-90)

Unfortunately, we do not know how long or if your process may be delayed if you do not provide an A# with your I-90 application as this is determined by USCIS on a case by case basis. You can submit your application with USCIS and they will let you know if they need any additional documents once your application has been received. CITATION: N/A