Yes, you can remit your contribution manually in SSS even without a payment reference number. However, you have to remit it directly to the cashier in the sss branch.
In my experience (only), I was able to remit my contribution via over-the-counter in an SSS branch. I have been to two different SSS branches and was able to manually pay my contributions successfully.
What I did is visit an sss branch and just accurately fill out an sss payment slip. At the front of the form, I wrote my complete name, SS number, and signature. Since I don’t have a PRN, I leave that space blank.
At the back, I just tick the appropriate box. I also indicate the applicable contribution months and years and the total amount that I would want to pay. I double-checked the information, and prepare the amount. Afterward, I proceed to the cashier to remit my contribution.
To give you an idea, here are the sss payment slips for my contribution remittance in 2021 and for 2022.
In January of 2021, I visited the SSS branch in Makati-Gil Puyat. As you can see in the photo, I left the space for PRN empty since I do not have a generated number for it.
This year in June 2022 I visited the SSS Navotas branch to do a manual payment via the cashier. You can see again in the payment slip that I left the space for PRN blank because I do not have the said reference number.
Perhaps, PRN is not needed if you will remit your contribution directly at the sss branch. But if you plan to pay it in accredited bayad centers, partnered banks, and collection agents. They will request your generated PRN.
Take for example, if you will use the GCash app on your smartphone. You can see in the photo that the said app is requesting for your PRN before you proceed to the next process. Otherwise, you won’t be able to continue with your payment.
There you have it guys. I have shown you that it is still possible to remit your contribution manually in SSS. However, the disadvantage is you need to go directly to an sss branch to do it.