I received my first-ever 5K in paper bonds yesterday (from my tax refund.)
It came in 12 separate envelopes, each containing one bond. The denominations were:
4x 1000
1x 500
1x 200
6x 50
On the very same day (yesterday), I logged onto the TreasuryDirect website to try to "convert" them to be "electronic" on my account. The instructions were extremely "long-winded-wall-of-text" spread across a couple of different web pages. I think I did it correctly. I ended up "adding" all 12 of the paper bonds to a "basket/cart" one-by-one, and then ended up having to print a PDF/summary of it (which they referred to as a "Manifest".) I signed the PDF, and put that in an envelope (along with the 12 paper bonds), and it will be in today's out-going mail, right back to the treasury.
Interestingly, when I log into my TreasuryDirect account online, there is nothing that I can find to indicate that there are $5000 worth of bonds "pending to be received" by the treasury. There is, however, a section called "My Converted Bonds" at the bottom of the page, under an Accounts Listing of "Linked Accounts Information" (which is new, after I followed the instructions.
I hope I did everything correctly! This all seems like a lot of wasted effort, wasted postage, and wasted time. Why can't the IRS form simply let you add an existing TD/online/electronic account number to have the bonds automatically added to? This wasted quite a bit of time yesterday, and I'm still not 100% sure that I did everything correctly. I scanned a backup copy of everything (the signed PDF and all 12 of the bonds) before I mailed it off.
Oh well.