I had to pay Discover twice when I was in DMP since the DMP was being them late. They were always straight with me. I would take them at their word and if you are using a credit monitoring system like TC, check the date that the account updates so you can verify this. I would also save a hard copy of all your statements just in case that go BofA on you.
Trust, but verify.
1/25/2021: FICO 850 EQ 848 TU 847 EX