Countersealing

from The Collaborative International Dictionary of English v.0.48

Counterseal \Coun`ter*seal"\ (koun`t[~e]r*s[=e]l"), v. t. [imp.
   & p. p. {Countersealed} (koun`t[~e]r*s[=e]ld"); p. pr. & vb.
   n. {Countersealing}.]
   To seal or ratify with another or others. --Shak.
   [1913 Webster]