In the situation you described, it seems that the company is facing financial difficulties and is providing you with two options for your departure. The reason they may prefer you to submit a resignation letter instead of issuing a termination letter could be due to legal or administrative reasons. When you resign, it is seen as a voluntary decision on your part, which may have different implications compared to being terminated by the company. Additionally, by resigning, you may be eligible for certain benefits or compensation that may not be provided if you are terminated. It is important to carefully consider your decision and understand the potential consequences of each option before making a choice.