I ask because I actually submitted three amended returns at the same time. Two of them was received by the IRS at the same time, but a third one was received two days later, causing a nearly extra month in processing delay. This is the one I am waiting on.
The other two, once there was an adjustment, I got the notices within seven to ten days, however I was declined the credits due to time frames involved. So I got nothing on those.
About the DD for amended return refunds, from looking at various forum, I am taking an educated guess here, but it seems it could be either one, or a combination of a couple of reasons.
1) The amount, and security. Looking at Reddit, for example, people are using that new postal service to see what mail is arriving. The one where you can see an image of the mail arriving. Some have been posting images showing their check envelope from the Treasury, but then saying it never arrived. One person on another forum indicated their refund was in the 5k range and got it via DD.
2) Length of time in taking to process. Again, looking at various forums, according to many who submitted their amended return via eFile indicated it took about six months to process, and they got a check. Others who mailed their return (like me), it is taking close to a year, or more to process the paper returns. Since they are paying out interest (now 7% as of 2023), plus waiting for so long, they are trying to expedite the refund.
