assemble (v)
 /əˈsem.bl̩/

to put together

proof (v)
/pruːf/

to look for errors

petition (n)
/pəˈtɪʃ.ən/

a formal, written request

mention (v)
 /ˈmen.ʃən/

to refer to something or someone

layout (n)
/ˈleɪ.aʊt/

a format; the organization of material on a page

fold (v)
/foʊld/

to bend the paper

courier (n)
/ˈkʊr.i.ɚ/ 

a messenger, an official delivery person

complication (n)
/ˌkɑːm.plɪˈkeɪ.ʃən/ 

difficulty, complex situation

beforehand (r)
/bɪˈfɔːr.hænd/

in advance, in anticipation

revise (v)
/rɪˈvaɪz/

to look at or consider again an idea, piece of writing, etc. in order to correct or improve it

two-sided (a)
 /tuː saɪdid/

having two sides or aspects

single-sided (a)
/ˈsɪŋ·ɡəl sɑɪdid/

having one side or aspect

correspondence (n)
/ˌkɔr·əˈspɑn·dəns/

letters written from one person to another, or the activity of writing and receiving letters

error-free (a)
/ˈer·ər fri/

containing no mistakes; faultless

formal (a)
/ˈfɔːr.məl/

public or official

attachment (n)
/əˈtætʃ·mənt/

something you send with a letter, contract, or other document to give extra information

document (n)
/ˈdɑk·jə·mənt/

an official paper or book that gives information about something, or that can be used as evidence or proof of something

email (n)
/ˈiˌmeɪl/

the system for using computers to send messages over the internet

recipient (n)
/rɪˈsɪp·i·ənt/

a person who receives something

make sure (phrase)
/meɪk ʃɔːr/

to look and/or take action to be certain that something happens, is true, etc.