Something similar (I think) happened to me recently. I paid off a mortgage in May but apparently my credit union had lost the original mortgage. So they had to apply to the county to get a “instument in lieu of original mortgage”. they had to have like 10 signatures all notorized saying that after ” a thorough and exaustive search” they certified that the original mortgage had been lost or destroyed, etc. Then they were able to register my satisfaction of mortgage. I figured that didn’t happen very often and Navy Federal is certainly not a subprime outfit. But if I stopped paying that mortgage I guess that would have been a serious problem for them.