No problem for you to come back and no fines to pay. Its been almost 4 years and the visa was automatically cancelled after 6 months from your last departure in Qatar. And besides your previous sponsor cannot renew your visa since your passport is with you. There's also no need for NOC. You already served the 2 year ban. But be sure that before going for finger printing, tell your PRO that you previously worked in Qatar and had a working visa before so the immigration will not get confused on your fingerprint records. Sometimes, you dont need to go for fingerprint. The immigration will use your previous record. Your residence ID number will be the same as your previous one. (Take it from me. I had the same situation last 2009) :-)
No problem for you to come back and no fines to pay. Its been almost 4 years and the visa was automatically cancelled after 6 months from your last departure in Qatar. And besides your previous sponsor cannot renew your visa since your passport is with you. There's also no need for NOC. You already served the 2 year ban. But be sure that before going for finger printing, tell your PRO that you previously worked in Qatar and had a working visa before so the immigration will not get confused on your fingerprint records. Sometimes, you dont need to go for fingerprint. The immigration will use your previous record. Your residence ID number will be the same as your previous one. (Take it from me. I had the same situation last 2009) :-)