Being a Green card holder (permanent resident card) is a proof of being officially granted immigration benefits to live and work in the United States legally. You can work and live in the US permanently.
Form I-90 for green card renewal :
Normally, a permanent resident card (green card) is valid for ten years. You need to go through the green card renewal process by filing Form I-90, Application for green card replacement with the USCIS. If your green card has already expired, make sure you renew your card at the earliest. Those renewing expired green cards will not be penalized. The same form is used when you want to change any biographic information on your card i.e if your name has changed because of marriage and also when you lose your card and need a green card replacement. Also, you will not lose your permanent resident status if you do not renew your green card. Permanent resident status does not expire.
However, per immigration laws, you need to carry evidence of your status (a valid, unexpired green card or temporary passport stamp). If you do not renew your expired / expiring card, you may experience difficulties in obtaining employment, benefits and re-entry into the US from abroad. Always, apply for your new green card before you travel and bring with you on any trip the temporary documentation you received. If, after traveling abroad, you try to re-enter the US with an expired green card, you may experience a delay during the inspections process at the port of entry,
Also, your employers will not accept an expired green card to verify employment authorization for new hires. You can use alternate documents that you will find on the Form I-9 (Employment eligibility verification form) such as social security card and driver’s license or have temporary evidence of status, such as an I-551 stamp or even the receipt notice for your Form I-90, Application to replace permanent resident card.
A conditional permanent resident is different from a permanent resident. A conditional resident will get a card that is valid only for two years. One has to remove the conditions during the 90 day period before the card expires and this card cannot be renewed. The conditions must be removed else you will lose your status. One has to file Form I-751 to remove the conditions on residence. Once conditions are removed, you will get a permanent resident card that will be valid for the next ten years.
Once you send completed I-90 application to the USCIS, you will to receive an Application Receipt Notice with a 13-character Application Receipt number within 30 days. This proves that USCIS has received your application and that it is being processed. You can check the status of your application with this receipt number. You also will be informed about the dates for fingerprinting and subsequently, your interview date with instructions related to the supporting documents you need to bring. The entire green card renewal process approximately takes three months.